Related to the Economics in Practice on p. 26: One reason for the increase in sales of frozen foods from $1 billion in 1950 to $53 billion in 2016 is the

A. increased opportunity cost of cooking frozen meals.
B. decrease in popularity of the microwave oven.
C. increased opportunity cost of preparing home-cooked meals.
D. decrease in the number of women in the labor force.

Answer: C