What is not true about durations?

Answer selection group

In the case of this ticket, if the maturity yield is lowered, the duration will be longer.

The unit of durations is the period (year).

The rate of change in bond prices is the adjusted durations times the change in maturity yields.

Higher durations reduce price elasticity to interest rates.

The duration of a permanent pension, which yields 5% and pays $100 per year, is 21 years.