Use the Following Scenario to Answer the Questions That Follow

Use the following scenario to answer the questions that follow.
An economy has two workers, Smith and Ricardo. Every day they work, Smith can produce 4 computers or 16 smartphones, and Ricardo can produce 6 computers or 12 smartphones.
-What is the opportunity cost for Smith to produce one computer?

A) 1/4 smartphone
B) 1/2 smartphone
C) 1 smartphone
D) 2 smartphones
E) 4 smartphones