【单选题】Suppose Carrie's utility function for clams is as follows: If she consumes 1 clam, she gets 10 units of total utility; for 2 clams, she gets 18 units of total utility; for 3 clams, she gets 24 units o...
A.
Carrie gets 6 units of marginal utility for the 5th clam.
B.
Carrie gets 6 units of marginal utility for the 3rd clam.
C.
Carrie would never choose to consume the 6th clam.