The chart shows immigration to the united states between 1840 and 1920

newly independent countries of the former ussr

it might be to see if the person answering knows what they are talking about other than just saying, "its b hope this ! : )" because they could say it then get the wrong answer because they only answered for the points.

the correct answer is, it increases the amount which is being deposited in the bank account of people.

when the fed buys treasury   bonds it increases the amount which is being deposited in people's accounts.

treasury bonds are termed as long-term or secure investment which offers payment after every six months up to the maturity of the bond.

there is a fixed rate for every treasury bond whereby the interest rate is being determined by the auction.

there is an additional fees for those who have not yet opened accounts with local commercial banks.