The Table Gives Marginal Product Data for Resources a and B

Multiple Choice

The table gives marginal product data for resources a and b. The output of these independent resources sells in a purely competitive market at $1 per unit. Assuming the prices of resources a and b are $5 and $8 respectively, what is the profit-maximizing combination of resources?

A) 7 of a and 7 of b
B) 6 of a and 4 of b
C) 4 of a and 4 of b
D) 5 of a and 7 of b