In an experiment described in the textbook, bar patrons preferred the taste of vinegar-laced beer in a glass labeled "MIT brew" to the taste of identical beer served in an unlabeled glass. Taste preference is a(n) variable in this study.

where is your diagram?

the consumer demand because the members have to be aware if people are going to buy what they want to sell in this case either energy drinks or a car wash.

answer; i do believe that its(gestation,suction-aspiration or vacuum aspiration;