In lmx theory, what ultimately determines whether the follower becomes a member of an in-group or an out-group?

Suppose for a consumer the marginal utility (mu) of bread is 20 utils and the mu of milk is 10 utils; the price of bread is $3 and the price of milk is $1. given this, a. more utility per dollar is gained from consuming bread than milk. b. more utility per dollar is gained from consuming milk than bread. c. the same amount of utility per dollar is gained from consuming milk as bread. d. the consumer is in consumer equilibrium.