Nikolaj Makes a New Year's Resolution to Lose Weight

Multiple Choice

Nikolaj makes a New Year's resolution to lose weight. On January 3 ^rd, he decides to go out for ice cream instead of going to the gym. Using the concept of revealed preference, economists would most likely conclude that Nikolaj:

A) is not a rational individual.
B) gains more utility from ice cream than working out.
C) has changed his preferences.
D) has no control over the actions he makes.