What principle created the figure of the optional insured? a) Uniformity and equivalence of benefits and services to urban and rural populations. ...

What principle created the figure of the optional insured?

a) Uniformity and equivalence of benefits and services to urban and rural populations.
b) Selectivity and distributivity in the provision of benefits and services;
c) Universality of coverage and care.
d) Equity in the form of participation in financing.
e) Diversity of financing base.