In Acting to Help Create a Secondary Mortgage Market, Fannie

In acting to help create a secondary mortgage market, Fannie Mae solved the "difficult to evaluate" problem by

A) pooling mortgages together and creating a new financial instrument called a mortgage pass-through.
B) functioning as the loan servicer, collecting the payments from various mortgages and creating a nice, even, steady stream of payments to the institutional investors.
C) requiring loan originators to make sure only FHA, VA, or other government-qualified mortgages were included in mortgage pools.
D) creating Ginnie Mae and Freddie Mac to service bundled loans for institutional investors.