The assumption that individuals act rationally implies that:Group of answer choicesthe greater the cost of a charitable deed to a benefactor, the more likely he or she is to perform that deed. people only consider the costs of an activity to decide whether it is worthwhile. people think only of themselves and disregard the well-being of others. people implicitly calculate the costs of and the benefits from an activity to decide if it is worthwhile. people undertake all those activities that do not have any marginal benefit.