story: Oliver felt like he'd spent hours unwrapping caramels. But it would be worth his time and effort. Him mom was making caramel apples when he had them all open. She dipped the apples into the melted caramel. He got to eat one right away as a reward for his hard work.
 selected sentence: But it would be worth his time and effort.
Unwrapping caramels would be worth oliver's time >Causes/Enables> Oliver's mom was making caramel apples