of the following actions did the Federal Reserve Board take to stabilize the financial environment after the financial markets collapsed in 2007-2008?…

Which of the following actions did the Federal Reserve Board take to stabilize the financial environment after the financial markets collapsed in 2007-2008?
It began to charge interest on reserves banks.
It ensured that the markets in commercial paper and other securities that were not functioning properly ceased to function.
It increased the interest rate to help banks regain their health.
It chose to not buy troubled assets from banks.
It lent money at the discount window to nonbanks.