Which Is an Independent Variable in a Study Where Tractor

Multiple Choice

Which is an independent variable in a study where Tractor Supply,a retailer of garden and farming equipment,increases the price of its most popular lawn tractor by $5 every month for three months and sees its effect on market share in the Dallas metropolitan area?

A) The variable being manipulated by the researcher to cause the change
B) A $5 increase in retail price every month for three months
C) The variable affected by the change
D) The variable being manipulated by the research to cause the change and a $5 increase in retail price every month for three months
E) Changes on market share after 3 months