Which of the following statements is most correct?

Question options:

	A debenture is a secured bond which is backed by some or all of the firm's fixed assets.
	Under a sinking fund, bonds will be purchased on the open market by the issuer when the bonds are selling at a premium and bonds will be called in for redemption when the bonds are selling at a discount.
	Junk bonds typically have a lower yield to maturity relative to investment grade bonds.
	The sinking fund provision makes a debt issue less risky to the investor.
	All of the above are correct.