Male Bullfrogs Produce Loud Calls During the Mating Season to Attract

Male bullfrogs produce loud calls during the mating season to attract females. The loudest males tend to mate with the most females. What can we reasonably conclude about this situation?

A) The louder a male's call, the lower his quality.
B) The louder a male's call, the higher his quality.
C) We cannot come to any conclusions based on the information given.
D) The loudness of a male's call is not a good predictor of his quality.