Toby reads a short article and decides that its main idea is this: It is very difficult--but not impossible--to learn to ride a unicycle. Persistence is the key. What textual evidence could Toby cite to back up his claim about the article's main idea? the article’s statistics about unicycle sales last year the article’s statistics about unicycle injuries last year the article’s quote from a professional unicycle instructor the article’s quote from someone who watches unicycle races on television