Hey All,
You guys have mostly rocked this, but I just wanted to add one quick thing about possessives.
Even though Béla Bartók’s music has proved less popular than Igor Stravinsky’s
and less influential than Arnold Schonberg’s, it is no less important.
This is a comparison question (which we know because we see the word THAN). So we need to work out what the two things are we want to compare. The first one (the one we can't change), is Bela Bartok's music. Because we have a possessive, we need to parallel that.
(A) Stravinsky’s and less influential than Arnold Schonberg’s, it
ANSWER: The "music" part after Bartok is understood whenever you use possessives with an apostrophe s.
(B) Stravinsky’s and less influential than Arnold Schonberg’s, he
PROBLEM: Comparison is great, but "he" is wrong. Even though it may look like Bela Bartok is in this sentence, he isn't! He's just a possessive adjective modifying music. Pronouns can ONLY refer back to nouns, not adjectives!
(C) Stravinsky’s is and less influential than Arnold Schonberg’s is, it
PROBLEM: No need for the "is", but it's also the wrong tense. "Has proved" is the main verb here, so we're in the present perfect. If anything, we would want to keep that tense (i.e. Stravinsky's has). But there's no reason to have them at all. I can just say "I am stronger than you". I don't need to say "I am stronger than you are."
(D) Stravinsky and not as influential as Arnold Schonberg, he
PROBLEM: We have no possessive here. Remeber, Bartok isn't actually in this sentence. Bartok is just an adjective. So we can't compare anything to Stravinsky and Schonberg, who are people. "He" also doesn't
(E) Stravinsky and not as influential as Arnold Schonberg, it
PROBLEM: Same as above.
Hope that helps!
-tommy