I think a very careful reading of the question stem is in order. You have found the appropriate line references for (A) line 35, (B) line 14, and (D) line 14.
The question stem reads, "According to the author, ..."
The author does not believe that these artists were prophetic. Instead the author is attempting to challenge the art critics mentioned in the second paragraph who did believe these artists were prophetic. So answer choice (E) is not something the author would think describes these artists, since the author is challenging this position. That's why answer choice (E) is correct.
Answer choice (C) is mentioned in line 47 with the example of Delecroix, but is also mentioned up in line 7 of the first paragraph.