John and Mary work at a bakery. John can decorate either 10 ice-cream cakes or 4 wedding cakes; Mary can decorate either 8 ice-cream cakes or 2 wedding cakes. According to this scenario

A) the opportunity cost of decorating a wedding cake for Mary is 4 ice-cream cakes.
B) the opportunity cost of decorating a wedding cake for Mary is 1/4 ice-cream cake.
C) the opportunity cost of decorating a wedding cake for Mary is 2 1/2 ice-cream cakes.
D) the opportunity cost of decorating a wedding cake for Mary is 2/5 ice-cream cake.

ANSWER:

A