Cell Phone Data Plans Are Most Useful When Used with a Smartphone

Multiple Choice

Cell phone data plans are most useful when used with a smartphone, and smartphones are most useful when used with a data plan. As the price of data plans falls, the demand for smartphones will:

A) decrease, because smartphones and data plans are substitutes.
B) increase, because smartphones and data plans are complements.
C) decrease, because smartphones and data plans are complements.
D) increase, because smartphones and data plans are substitutes.