Phone Data Plans Often Charge a High Price for Daytime

Multiple Choice

Phone data plans often charge a high price for daytime use and a lower price on evenings and weekends. An economist would say this is because

A) total benefits decrease as you use more minutes.
B) it is less expensive to provide service when it is dark outside.
C) marginal benefits increase as you talk longer.
D) not many people have cell phones these days.
E) marginal benefits can decrease as circumstances change.