Answer:
c. Ml would decrease; there would be no change in M2
Explanation:
M1 is one of the narrowest definition of money supply, M1 is defined as the currency held by the public plus demand deposits or checkable deposits balances.
M2 is a wider definition of money stock than M1. It is important to note that M2 is a combination of m1 plus time deposits.
If Ann converts some of her checkable deposits into a certificate of deposit, this action will decrease the balance in M1 because checkable deposits is a component of M1. But M2 will not change because M2 is a composition of both M1 and time deposit (i.e. certificate of deposit), it will only means a reclassification within the same class.