If They Spend All Night Writing Computer Programs,Laurence Can Write

Multiple Choice

If they spend all night writing computer programs,Laurence can write 10 programs,and Carrie Anne can write 5.If they spend all night making sunglasses,Laurence can make six pairs,and Carrie Anne can make four.We know that:

A) Laurence's opportunity cost of writing programs is less than Carrie Anne's.
B) Laurence's opportunity costs of writing programs and of making sunglasses are less than Carrie Anne's.
C) Carrie Anne's opportunity costs of writing programs and of making sunglasses are less than Laurence's.
D) Carrie Anne's opportunity cost of writing programs is less than Laurence's.