Grace is a life insurance agent. She is attempting to sell a large life insurance policy, but the prospective purchaser is having second thoughts. To persuade the prospective purchaser, Grace said, "I will earn a $1,000 commission if you buy this policy. I'll give you $500 of my commission if you buy the policy." In most states, what illegal sales practice will Grace be guilty of if she splits her commission with the purchaser? Rebating Churning Backdating Twisting