Suppose Carrie's Utility Function for Clams Is as Follows: If

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 of total utility; for 4 clams, she gets 28 units of total utility; for 5 clams, she gets 30 units of total utility; and for 6 clams, she gets 26 units of total utility.

A) Carrie gets 9 units of marginal utility for the 2^nd clam.
B) Carrie gets 8 units of marginal utility for the 3^rd clam.
C) Carrie gets 7 units of marginal utility for the 4^th clam.
D) None of the above are true.