The Growth of Junk Bond Markets Can Be Traced To

The growth of junk bond markets can be traced to:

A) the issuance of callable debt.
B) the small difference between the return on high yield versus the return on low yield bonds.
C) the large difference between the return on high yield versus the return on low yield bonds.
D) the fact that there is virtually no difference between the return on high vs low yield bonds.
E) the emergence of junk yards as a force in the late 1970's.