Sergei has multiple options for which job to work on Saturday. He only has time to work one job. He can choose to: rake up leaves to make $50, make deliveries for $70, or babysit for $65. If Sergei chooses the option that makes him the most money, what is the opportunity cost of the best decision?

Responses
$65
$120
$50
$70

The opportunity cost of the best decision is $120.