Which one of the following statements about mortgage$-$backed securities $($MBSs$)$ is correct?

A$)$

The minimum investment for most collateralized mortgage obligations $($CMOs$)$ is $$10,000.$

B$)$

Private label collateralized mortgage obligations $($CMOs$)$ are backed by government$-$sponsored enterprises $($GSEs$).$

C$)$

MBSs allow banks to remove mortgages from their balance sheets.

D$)$

MBSs reduce market liquidity.