Suzie's Bagels Is a Breakfast Deli Located on a University

Multiple Choice

Suzie's Bagels is a breakfast deli located on a university campus. Suzie wants to use regression analysis to estimate the demand for her bagel sandwiches. Suzie has collected daily data on the quantity of bagel sandwiches sold over the last year. In order to correctly specify the regression, all of the following variables should be considered except which one?

A) the prices of Suzie's bagel sandwiches
B) the amount of advertising spent by Suzie's competitors
C) the cost of university housing
D) the amount Suzie spent on advertising