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 charged by Suzie's competitors
B) the prices charged for university t- shirts
C) the amount Suzie spent on advertising
D) the prices of Suzie's bagel sandwiches