George's Grocery Orders Two Dozen Live Lobsters from Sea Food

George's Grocery orders two dozen live lobsters from Sea Food Flyers.George's is to keep the lobsters happy by keeping them in a tank following certain instructions to keep the water at the right temperature,etc.The sale is made on a trial basis and George's may return all unsold lobsters at the end of 10 days.This contract is a:

A) contract to sell future goods.
B) conditional sale.
C) sale or return.
D) sale on approval.