If the price of a cup of Dunkin' Donuts coffee increases while the price of a Starbucks latte is unchanged, we expect the number of lattes purchased at Starbucks to...
a) decrease, as some consumers will switch to Dunkin' Donuts.
b) increase, as Starbucks becomes relatively cheaper.
c) remain unchanged, as the prices of lattes are unaffected.
d) decrease, as Starbucks raises its prices to match Dunkin' Donuts.