US Treasury issues TIPS (Treasury Inflation-Protected Securities). Which of the following are true about this security?

Group of answer choices

It makes no periodic interest payments and makes one lump sum payment at maturity.

pay a variable interest rate that is indexed to inflation but maintain a constant principal.

provide a constant stream of income in real (inflation-adjusted) dollars and have their principal adjusted in proportion to the Consumer Price Index.

provide a constant stream of income in real (inflation-adjusted) dollars.

have their principal adjusted in proportion to the Consumer Price Index.