Kathleen Likes Avocado and Crab Dip

Multiple Choice

Kathleen likes avocado and crab dip. After eating avocado and crab dip with four crackers, she switches to cheese with crackers. We can conclude that

A) the avocado and crab dip cannot have tasted that good.
B) the avocado and crab dip with crackers now has a marginal utility of zero.
C) at this point cheese and crackers have a higher marginal utility per dollar spent than that of avocado and crab dip with crackers.
D) Kathleen is no longer maximizing her utility.