Because she has oversight responsibility for the servicing and repair of her company's fleet of cars, Rhonda frequently calls the garage mechanic to inquire whether service on various cars has been completed. Because service completion times are unpredictable, she is likely to be reinforced with positive responses to her inquiries on a schedule

"Because she has oversight responsibility for the servicing and repair of her company's fleet of cars, Rhonda frequently calls the garage mechanic to inquire whether service on various cars has been completed. Because service completion times are unpredictable, she is likely to be reinforced with positive responses to her inquiries on a variable-interval schedule."

Explanation:

the answer is b, encourage free trade

because this was the year that the state of israel was formed