Research on the Relationship Between Physiological Arousal and Performance Has

Research on the relationship between physiological arousal and performance has determined that:

A) as arousal increases, performance decreases to a point, but after that, further arousal serves to increase performance.
B) as arousal increases, performance increases to a point, but after that, further arousal serves to decrease performance.
C) as arousal increases, performance always tends to increase.
D) there is no relationship between arousal and performance.