The correct answer is A. There are two male puppies in the litter.
Explanation:
In fact, in all of these sentences, there is only one adjective, and it's the word male. Sentences B, C, or D do not have any adjectives in them.
Adjectives are words used to describe nouns in more detail. In sentence A, you can see that the adjective male gives us more information about the noun puppies. Without the adjective, we wouldn't know whether the puppies are male or female.
