Which sentence includes a gerund phrase?

Question

A. did you notice their cleaning of the garage?
B. to finish this job, we need to start early.
C. Let's take the old clothes to the thrift store.
D. they were already working when we got there.

Answer 1

A. did you notice their cleaning of the garage?

In this sentence, "cleaning of the garage" is the gerund phrase, with "cleaning" being the gerund.