Which of the following sentences illustrates the proper use of parallel construction?

Which of the following sentences illustrates the proper use of parallel construction?

A. Terry hoped to find a new job that would let him earn extra cash in the summer and to work fewer hours.
B. Although Tommy was failing his biology class at college, he was passing his chemistry class.
C. Trina loved to sail, skate, swim, and surfing.
D. Tatiana declared that the people in her office are smarter than the people who work in Tad's office.

Answer - D