The author discusses the example from musicology primarily in order to A. distinguish the nothing of institutional authority from that of intellectual authority B. given an example of an argument possessing intellectual authority that did not prevail in its own time C. identify an example in which the ascription of musical genius did not withstand the test of time D. illustrate the claim that assessing intellectual authority requires an appeal to institutional authority E. demonstrate that the authority wielded by the arbiters of musical genius is entirely institutional