Verbal guide mixed set RC


I found this passage very confusing especially questions 2 and 3 both of which I got wrong, I remember Greg has explained them in one of the videos can someone pls put a link of those videos? I do not remember which video it was.

For question 21, it says in line 31 that pianists stopped playing any baroque music, so since it’s an inference question, should I not choose answers which are directly given evidence in passage? I still can’t understand how the answer is D.
For question 22, I chose D because the passage says on line 25 that ladowska took all liberties which made option D and E both ambiguous because both of them talk about sticking to classical rules, overall I found the mixed set 1 quite difficult and could only score 20/25 :confused: