Which of the following scenarios is an example of utilizing a monetary incentive?

Jesse saw an ad that the new gaming system is coming out tomorrow so he goes to the electronics store to preorder his gaming system.
Mary wants to go to the grand opening of the new movie theater so she purchases her tickets ahead of time.
Adam hears that the new pizza place in town is amazing so he decides to take his girlfriend there to dinner the following night.
Tim looks in the newspaper to find coupons for the groceries that he needs for the week.