I believe the answer is: B. <span>You only need to sign a deposit slip when receiving cash.
Deposit slip would be filled with a list of cash and cash equivalent that you give to bank teller to be added to your bank account.
Most bank provide the services which allow you to take small percentage of your deposited check in the form of cash. When doing this, you need to sign it as a form of authorization.</span><span />
<u>Solution and Explanation:</u>
(a) If people need to hold more cash, the demand for money increases, shifting money demand curve rightward, leading to higher interest rate.
(b) If Fed does not respond, the price level will decrease (since higher the demand for money will increase interest rate, causing investment demand to fall, lowering aggregate demand and shifting AD curve leftward which lowers price level).
(c) TRUE - Increase in the money supply will decrease interest rate, keeping price level unchanged.
The oil is denser
the water and vinegar are not as dense