In an Eight-Hour Day, Andy Can Produce Either 24 Loaves

Multiple Choice

In an eight-hour day, Andy can produce either 24 loaves of bread or 8 kilograms of butter. In an eight-hour day, Rolfe can produce either 8 loaves of bread or 8 kilograms of butter.
Based on the information above, the opportunity cost of producing 1 loaf of bread is

A) 1 hour for Andy and 20 minutes (1/3 hour) for Rolfe.
B) 1/3 kilogram of butter for Andy and 1 kilogram of butter for Rolfe.
C) 3 kilograms of butter for Andy and 1 kilogram of butter for Rolfe.
D) 8 kilograms of butter for both Andy and Rolfe.
E) not calculable from the given information.