Grace is disappointed with the relatively low rate of return she is earning on her government bond mutual fund. She sees another bond fund that invests in corporate securities offered by firms that are in financial distress and/or do not have much experience in offering bonds to the general public. She notices the return on these bond mutual funds are much higher than what she is currently invested in. Grace has just discovered what type of mutual bond fund?

a. Alternative bond funds

b. High-yield or junk bond funds

c. Municipal bond funds

d. Initial bond funds