Which of the following substances are considered toxic and have a 25-year period of exposure monitoring according to Brazilian legislation? a) Orga...

Which of the following substances are considered toxic and have a 25-year period of exposure monitoring according to Brazilian legislation?
a) Organochlorine pesticides;
b) Manufacture and use of nitrogen mustard;
c) Manufacture and handling of polychlorinated biphenyls (PCBs);
d) Manufacture and use of vinyl chloride as a monomer in the manufacture of polyvinyl chloride (PVC) and other resins and as an intermediate in chemical productions or as an organic solvent;
e) Manufacture of polychloroprene;
f) Manufacture and use of chloroform (trichloromethane) and carbon tetrachloride;
g) Manufacture, industrial use, and manipulation of chromium, chromic acid, chromates, and bichromates;
h) Manufacture of ferrochrome alloys;
i) Electroplating of metals and polishing of chromed surfaces;
j) Spray painting using paints with chromium pigments;
k) Welding of stainless steel;
l) Manufacture and use of carbon disulfide;
m) Extraction and preparation of white phosphorus and its compounds;
n) Manufacture and application of phosphorus and organophosphorus products;
o) Extraction and beneficiation of nickel ores;
p) Nickel plating of metals;
q) Manufacture of nickel-cadmium batteries;
r) Extraction, processing, beneficiation, and maintenance activities carried out in oil extraction units, oil plants, and petrochemical plants;
s) Extraction of ores in open-pit mining;
t) Beneficiation and treatment of mineral products that generate dust containing free crystalline silica;
u) Manufacture, processing, application, and recovery of refractory materials;
v) Manufacture of glass and ceramics;
w) Construction of tunnels;
x) Dry grinding and cutting of materials containing silica;
y) Manufacture and vulcanization of rubber products;
z) Manufacture and retreading of tires;
aa) Styrene; butadiene-styrene; acrylonitrile; 1-3 butadiene; chloroprene; mercaptans, n-hexane, toluene diisocyanate (TDI); aromatic amines;
bb) Aromatic amines, aminobiphenyl, auramine, azathioprine, bis (chloromethyl) ether, 1-4 butanediol, dimethanesulfonate (milan), cyclophosphamide, chlorambucil, diethylstilbestrol, acrylonitrile, 4-dimethylaminoazobenzene, benzo (a) pyrene, beta-propyl lactone, bischloroethyl ether, bischloromethyl, chloromethyl ether, dianisidine, dichlorobenzidine, diethyl sulfate, dimethyl sulfate, ethyleneamine, ethylenethiourea, phenacetin, methyl iodide, ethylnitrosoureas, methylene-ortho-chloroaniline (MOCA), nitrosamine, orthotoluidine, oxymethalone, procarbazine, propansultone, 1-3-butadiene, ethylene oxide, styrene, 1-chloro-2,4-nitrodiphenyl, 3-poxipropo-piano;
cc) Manufacture of magenta (aniline and orthotoluidine);
dd) Manufacture of synthetic fibers;
ee) Chemical syntheses;
ff) Manufacture of rubber and foams;
gg) Manufacture of plastics;
hh) Production of medicines;
ii) Wood preservation operations with creosote;
jj) Sterilization of surgical materials.

a) a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, aa, bb, cc, dd, ee, ff, gg, hh, ii, jj.
b) a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, aa, bb, cc, dd, ee, ff, gg, hh.
c) a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z, aa, bb, cc, dd, ee, ff, gg.