The term "homo economicus" refers to which of the following people?

Select one:

a. Henry, who has waited until the last minute to make an economic decision.

b. Kevin, who buys a stock today because the price of the stock is higher than it was yesterday.

c. Calvin, who eats a bowl full of peanuts before dinner and thus ruins his appetite for dinner.

d. Kenny, who rationally weighs all of his options before spending his money.

e. George, who ignores negative information about stocks he has previously purchased.