Question

Identify the sentence that incorporates parallel structure.
A) My week at camp included rock-climbing, mountain biking and sleep.
 B) During my week at camp, I swam, hiked, biked and skiing on the lake.
 C) My week at camp consisted of playing soccer, riding mountain bikes and crafts.
  D) During my week at camp, I scaled the climbing wall, built a fort, and jumped on the trampoline.

Answer 1

I already took the test so here is the answer

Answer 2

The sentence that incorporates parallel structure is:

D. During my week at camp, I scaled the climbing wall, built a fort and jumped on the trampoline.

All the verbs in that sentence are in simple past tense (scaled, built, jumped).

Why not the others?

A. My week at camp included rock-climbing, mountain biking and sleep. In order to have a parallel structure the statement should have said sleeping instead of sleep.

B. During my week at camp, I swam, hiked, biked and skiing on the lake. In order to have a parallel structure the statement should have said skied instead of skiing.  

C. My week at camp consisted of playing soccer, riding mountain bikes and crafts. In order to have a parallel structure the statement should have said making crafts instead of just crafts.