Why might a monopoly or a trust in a certain industry be bad for both consumers and workers?

Since consumers have no choice but to buy from the trust/monopoly they have to pay (usually) higher prices than they would if there were competition between businesses owned by different people. Without competition there might be little incentive to improve product quality and to develop new products.

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.