Which is the topic sentence of the following paragraph?
 On the day of my piano recital, I was experiencing nervousness. I felt as if
 grasshoppers were jumping on my skin. Although I had been practicing the waltz |
 was going to play, I was afraid the worst would happen. As the day wore on, I grew
 increasingly fearful. I couldn't concentrate on anything until the moment of my
 performance finally arrived.
 a) As the day wore on, I grew increasingly fearful.
 b) Although I had been practicing the waltz I was going to play, I was afraid the
 worst would happen.
 C) On the day of my piano recital, I was experiencing nervousness.
 d)
 As the day wore on, I grew increasingly fearful. I couldn't concentrate on
 anything until the moment of my performance finally arrived.