Which agreement removes customs and passport controls at the common borders of many EU countries?

As of December 2010, the largest single component of M1 consists of

a. checkable deposits at banks. b. money market mutual funds. c. savings deposits. d. currency.

If the velocity of money is 5, then each dollar must have exchanged hands on average 5 times per ______.

a. day b. week c. month d. year