Why does U$.$S$.$ Treasury debt offer relatively low market yields? $($Mark all that apply.$)$

Question $10$ options:

The Treasury is perceived to be likely to default.

The Treasury is perceived to be unlikely to default.

Treasury debt is insured against default.

Treasury debt is traded in highly liquid markets.

The Treasury has the right to call its debt back.

The Treasury does not have the right to call its debt back.

Treasury debt is exempt from federal income taxes.

Treasury debt is exempt from state and local income taxes.

There is a legal limit on the interest rate that the Treasury is allowed to pay.

Persons who buy Treasury debt are eligible to win valuable prizes.