1. The correct answer is this: AN INCREASE IN THE DEMAND FOR MONEY.
The federal reserve has many tools, which it uses to control the amount of money in the economy and one of them is treasury bill. When the federal reserve sell treasury bill, it reduces the amount of money supply in the economy and it increases the demand for money.
2. The correct option is DECREASE / INCREASE/
If the federal reserve sell securities in the open market and it is bought by foreigners, the US financial assets will decrease while the international value of dollar will increase.