问一道RC 题

kimbolUID: 2168344

OG RC passage 39 Q108
108. In using the word “understandable” (line 14), the
author most clearly conveys
(A) sympathy with attempts by the Brotherhood
between 1925 and 1935 to establish an independent
union.
(B) concern that the obstacles faced by Randolph
between 1925 and 1935 were indeed formidable
(C) ambivalence about the significance of unions to
most Black workers in the 1920’s.
(D) appreciation of the attitude of many Black workers
in the 1920’s toward unions.
(E) regret at the historical attitude of unions toward
Black workers.

answer: D
不过从哪里看出来有appreciation 的?