MrMadison Went into a Supermarket Where He Saw a New

Mr.Madison went into a supermarket where he saw a new kind of toothpaste on a shelf,ticketed at $2.69.He decided to try it,so he took it to the checkout and placed it on the moving counter.The staff member at the checkout rang up the sale,took Mr.Madison's money,put the toothpaste in a bag,and handed it with the receipt and the change to Mr.Madison.A contract was formed when:

A) Mr.Madison picked up the toothpaste.
B) Mr.Madison put the toothpaste on the checkout counter.
C) Mr.Madison paid for the toothpaste.
D) The supermarket employee rang in the sale and took his money.
E) The supermarket employee gave Mr.Madison the bag,the receipt,and his change.