To the best of our knowledge, he decided that his major would be acting.

Which does the sentence contain?

A. A conjunction
B. A gerund
C. An infinitive
D. A participle

B. A gerund

Explanation:

"Acting" is the gerund. Gerunds are nouns, and as such, can serve as subjects or objects in a sentence. In this case, it is the object.

remember, the goal of an adjective clause is to add more information to a noun or a pronoun. as you can see from the examples above, you can add information by including a longer adjective clause or tighten up a sentence by turning the adjective clause into an adjective phrase.