Can someone explain to me what the secretary of treasury does? what's their job? (simple wording , cause my brain is incapable of being a dictionary. : ') )

Acertificate of deposit usually pays you more interest because you need a larger amount of money to open it and a the money in a cd is the banks money not yours. b the money in a cd cannot be withdrawn until a future date. c the money in a cd is considered a loan. d the money in a cd is digital money.