An increase in the money supply, ceteris paribus, usually:

a. increases the interest rate and increases aggregate demand
b. increases the interest rate and decreases aggregate demand
c. decreases the interest rate and increases aggregate demand
d. decreases the interest rate and decreases aggregate demand

C) Decreases the interest rate and increases aggregate demand

Explanation:

This is an example of an expansionary monetary policy. An increased money supply means commercial banks have more money and a relaxed reserve requirement thus they have more flexibility to create credit. Increased money supply therefore has reduced interest rates that allow people to take advantage by borrowing.

More money also means people have more money to spend and thus an increased aggregate demand. While the borrowing is also cheaper, people may even borrow to spend more causing a rightward shift in the aggregate demand curve.

Hope that helps.

Property and 401k

Explanation:

Savings are yours to withdraw at anytime. Stocks can be sold on the stock market fairly easily.

Property is less liquid because you have to search for a buyer which can take time.

With a 401k you can only begin withdrawing after reaching the age of 59. Of course a 401k will be liquid if you are 59