Kris has two choices for a part-time job after school. Kris could make $10 per hour entering data for a local company, but none of his friends work there. The second job offer pays $8 per hour at a local restaurant, and many of his friends work there.If Kris works 20 hours per week, what would be the weekly opportunity cost of accepting the job at the restaurant? A) $120 B) $160 C) $20 D) $40