Burger Town Introduced a New Hamburger and Released It in Two

Burger Town introduced a new hamburger and released it in two different cities at two different prices. Marketers of Burger Town then analyzed the sales records of their outlets at the two cities, determined the price
That resulted in better profits, and used the information to set a nationwide price for their new offering. This is an example of .

A) experimental research
B) exploratory research
C) descriptive research
D) survey research
E) focus group research