Which of the following will have the largest increase on current consumption? a) An agent who obeys the permanent income hypothesis receives an expected salary bonus of one dollar. b) An agent who knows that taxes will increase one dollar in the future receives a tax break of one dollar in the current period. c) An agent is worried she will lose a dollar of income this period, so she engages in precautionary saving. d) An agent with a binding borrowing constraint unexpectedly finds a dollar on the floor