Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is best, choose the first answer; otherwise choose one of the others.

Civic managers are unable to keep from mixing channels of treated and untreated sewage as volumes rise and businesses and homes dig deep into the ground for water that is fast receding in the aquifers.

Civic managers are unable to keep channels of treated and untreated sewage from mixing as volumes rise and businesses and homes dig deep into the ground

Civic managers are unable to keep channels of treated and untreated sewage from mixing as volumes rise and businesses and homes dig deeper in the ground

Civic managers are unable to keep channels of treated and untreated sewage from mixing as volumes rise and businesses and homes dig deeper into the ground

Civic managers are unable to keep channels of treated and untreated sewage from mixing as volumes rises and businesses and homes dig deeper into the ground

Civic managers are unable to keep channels of treated and untreated sewage from mixing as volume rise and businesses and homes dig deep into the ground