What is the correct classification of the indefinite article? I. It determines the noun, particularizing it. II. It determines the noun, generaliz...

What is the correct classification of the indefinite article?

I. It determines the noun, particularizing it.
II. It determines the noun, generalizing it.
III. It is represented by the words uma, umas, um, uns.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) Both II and III are correct.