Which of the following is not an example of scarcity?

A$.$ deciding whether to sleep after attending an all$-$night party or to attend your Economics lecture

B$.$ deciding whether or not Pluto should be considered a planet

C$.$ deciding whether to use the money you've saved to pay your tuition or to buy a new car

D$.$ deciding whether to take a part$-$time job or to take an extra course this term