Mastering basic mathematics is an important goal for younger students. Select the answer choice that identifies the noun in the sentence.

Mastering basic mathematics is an important goal for younger students. Select the answer choice that identifies the noun in the sentence.

Explanation

Students is a plural noun.

 NOTE: Mastering (A) is a gerund, i.e. a verb form functioning as a noun. But since is already a noun, it is the better choice.

Important is an adjective modifying the noun goal.

Younger is an adjective modifying the noun students.