$$Mortgage$-$backed securities$$ became attractive investments in the $1990$s $($and before$)$ because they were thought to

Group of answer choices

eliminate the problems of $$adverse selection$$ and $$moral hazard.$$

eliminate all risks.

provide portfolio diversity, which would allow for the spreading risk taking, reducing risks of buying mortgages and increasing the capacity of investors to buy more risky mortgages with higher interest rates.

All of the above

None of the above