Which sentence below demonstrates incorrect subject-verb agreement?
A. I was still trying to recover from the pulled hamstring I had suffered during training a month before.
B. Gram Glenn was the state's fastest runner in the hundred yard dash, and he was the odds-on favorite to win this heat.
C. We all starts from the same point, but I knew going into the race that it was going to be harder than I originally thought.
D. As I squatted into position on the starting blocks, I could feel my legs tighten and all of the blood rush forward to my hands.