If They Spend All Night Writing Computer Programs, Laurence Can

Essay

If they spend all night writing computer programs, Laurence can write 10 programs while Carrie Anne can write 5.If they spend all night making sunglasses, Laurence can make 6 while Carrie Anne can make 4.We know that:
A.Laurence's opportunity cost of writing programs is less than that of Carrie Anne.
B.Laurence's opportunity cost of writing programs and of making sunglasses is less than that of Carrie Anne.
C.Carrie Anne's opportunity cost of writing programs and of making sunglasses is less than that of Laurence.
D.Carrie Anne's opportunity cost of writing programs is less than that of Laurence.