Which of the following statements is correct?

		a."Everything else held constant, the market price of a discount bond will increase and approach the bond's par value as the maturity date approaches. "
		b. "Bond prices and interest rates move in the same direction, i.e., if interest rates rise, so will bond prices"
		c. "Everything else equal, a convertible bond should have a lower price than a non-convertible bond."
		d. "Everything else equal, a callable bond should have a higher price than a noncallable bond."