Cassandra and Jim Can Make Either Sushi or Wine or Some

Cassandra and Jim can make either sushi or wine or some combination of both.Each have eight hours to work.In her eight hours Cassandra can make 24 sushi rolls or 8 litres of wine (or some combination, if she splits her time) .Jim can make either 16 sushi rolls or 4 litres of wine (or some combination) .Which statement is true?

A) Cassandra's opportunity cost of making a sushi roll is 3 litres of wine; Jim's opportunity cost of making a sushi roll is forgoing ¼ a litre of wine.
B) Cassandra's opportunity cost of making a sushi roll is a litre of wine; Jim's opportunity cost of making a sushi roll is forgoing 4 litres of wine.
C) Cassandra's opportunity cost of making a sushi roll is 2 litres of wine; Jim's opportunity cost of making a sushi roll is forgoing 8 litres of wine.
D) Cassandra's opportunity cost of making a sushi roll is 1/3 a litre of wine; Jim's opportunity cost of making a sushi roll is forgoing ¼ a litre of wine.
E) None of the above.