Read the following passage:
"When Dorian came home from work, he discovered his twins and their babysitter were a study in contrasts. The boys were
gleefully racing around the yard at high speed, while grandma sat limply on a lawn chair, totally enervated.
Based on context clues in the reading, define "enervated."

A. Energized
B. Excited
C. Exthused
D. Exhausted