Which One of the Following Statements Is True

Which one of the following statements is true?

A) Interest rate risk decreases as maturity increases.
B) Long-term bonds have lower price volatility than short-term bonds.
C) All other things being equal,short-term bonds are more risky than long-term bonds.
D) As interest rates decline,the prices of bonds rise; and as interest rates rise,the prices of bonds decline.