Johnny Spends His Day Doing a Variety of Activities;he Spends

Multiple Choice

Johnny spends his day doing a variety of activities;he spends the morning exercising and doing yard work,reads in the afternoon,and hosts a dinner party in the evening.Economists would best explain his choice to do a variety of activities instead of a single activity using the concept of:

A) tastes and preferences
B) budget constraints
C) diminishing marginal utility
D) income effect