2. If an individual has a constant MRS of shoes for sneakers of 3/4 (that is, he or she is always willing to give up 3 pairs of sneakers to get 4 pairs of shoes) then, if sneakers and shoes are equally costly, he or she will a. wear sneakers only 3/4 of the time. b. buy only shoes. c. spend his or her income equally on sneakers and shoes. d. buy only sneakers