Question

To pump the volume up or clarifying sound helps people to hear each other over street noise or in echoing spaces.

Which choice shows the correct way to revise the underlined portion of the sentence?

A.
no change

B.
Pumping up the volume

C.
Pumping the volume up

D.
To pump up the volume

Answer 1

B

Use the gerund phrase "Pumping up the volume" so the subject is parallel and grammatical with "clarifying sound" (both gerund phrases) and correctly functions as the sentence subject.