Suppose that Marie’s marginal utility from consuming one more unit of bubble gum is 10 utils while her total utility from consuming one more unit of cake increases from 130 utils to 142 utils. Given this information and holding everything else constant, if the price of bubble gum is $1 per unit and the price of cake is $2 per util, then Marie should
a. Consume more bubble gum.
b. Consume less bubble gum.