Scenario: with Her Available Resources, Wendy Can Produce 20 Greeting

Multiple Choice

Scenario: With her available resources, Wendy can produce 20 greeting cards or 10 earrings. Sarah, with the resources she has, can produce 5 greeting cards or 15 earrings.
-Refer to the scenario above.What is Sarah's opportunity cost of producing one greeting card?

A) 0.33 earrings
B) 0.5 earrings
C) 1 earring
D) 3 earrings