Shaquille Is a Professional Basketball Player

Multiple Choice

Shaquille is a professional basketball player. He never knows for sure which of his shots will result in a basket, but the more shots he takes, the more baskets he makes. How is Shaquille's shooting reinforced in this example?

A) on a variable-ratio schedule
B) on a fixed-interval schedule
C) on a variable-interval schedule
D) on a fixed-ratio schedule