After swimming 100 laps at the pool,Erik decides to swim 10 more before lifting weights.Which economic principle does this statement BEST represent?
A)Choices are necessary because resources are scarce.
B)The true cost of something is its opportunity cost.
C)"How much" is a decision at the margin.
D)There are gains from trade.

Question

Quizplus · Accepted Answer

This statement represents the principle of "how much" at the margin because Erik is making a decision to swim an additional 10 laps before moving on to the next activity. He is making a decision about how much more to do, or how many more laps to swim, before moving on to the next activity.

After Swimming 100 Laps at the Pool,Erik Decides to Swim