HotPizzeria Distinguished Itself from Other Pizza Places in the City

HotPizzeria distinguished itself from other pizza places in the city by emphasizing the use of freshly made cheese in their pizzas instead of using processed cheese like their competitors. Although HotPizzeria priced its pizzas at a higher rate when compared with its competitors, its sales increased at a rapid rate. In the context of strategy, this scenario emphasizes the use of a _____.

A) differentiation strategy
B) high-cost strategy
C) greenfield strategy
D) low-cost strategy