Which word in the sentence does the adjective clause modify?

Is the babysitter whom we all liked too busy?

A.

busy

B.

is

C.

babysitter

D.

we

The word in the sentence does the adjective clause modify is letter (C.) babysitter. Adjective clause functions identically with adjectives that uses the indicators such as the pronouns who, whom, which, and that; or the adverbs where, when, and why.