OG 81题 求逻辑大神来帮忙啊

dazzle文佳

OG 81) which of the following most logically completes the argument?
the attribution of the choral work Lacrimae to the composer Pescard (1400-1474）has been regarded as tentative, since it was based on a single treatise from the early 1500s that named Pescard as the composer. Recently, several musical treatise from the late 1500s have come to light, all of which name Pescard as the composer of Lacrimae. Unfortunately, these newly discovered treatises lend no support to the attribution of Lacrimae to Pescard, since ______.

a) the treatise from the early 1500s misientifies the composers of some of the musical works it considers
b) the author of the treatise from the early 1500s had no very strong evidence on which to base to the identification of Pescard as the composer of Lacrimae
c) there are works that can conclusively be attributed to Pescard that are not even mentioned in the treatise from the early 1500s
d) the later treatises probably had no source for their attribution other than the earlier treatise
e) no known treatises from the 1600s identify Pescard as the composer of Lacrimae

求各位逻辑大神给思路啊，我读了半天， 感觉都没有正确理解题意。 是OG 81的题目。感恩的♥！