Treasury Inflation-Protected Securities (TIPS)

a) pay a fixed interest rate for life.

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

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

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

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