Fred's Mother Allows Him to Watch Television on Sundays Only

Multiple Choice

Fred's mother allows him to watch television on Sundays only if he studies for four hours a day,every day of the week.Which of the following schedules of reinforcement in operant conditioning is Fred's mother using to discipline him?

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