Cameron and Mitchell want to convince their daughter to stop leaving her toys scattered all around the floor, so they leave her a sign by her toy box. According to reactance theory, which of the...

Cameron and Mitchell want to convince their daughter to stop leaving her toys scattered all around the floor, so they leave her a sign by her toy box. According to reactance theory, which of the following signs would be most effective?

a. “Please try to remember to clean up your toys when you are done with them.”

b. “All toys MUST be put away after they are used.”

 c. “Do not leave toys lying around!.”

d. “Your job is to clean up after yourself.”