Achallenge that italy faced after unification was

The biggest challenge cause by frequent warfare among the cities in Italy and the country divided into different foreign rule. Italy was divided into different monarchs like the Hapsburg and France, it was also under the rule of the Austrian. 

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.