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. The type of glass is a(n) variable in this study.

Why did the medicine lodge creek treaty fail to bring peace to west texas? a. native americans protested the sale of weapons on reservations. b. supporters of the treaty face discrimination in their own communities. c. the united states government and native americans both refused to fully carry it out. d. the united states government prevented its military from entering reservations.