Hi,
I can see why C is correct, but I have trouble ruling out B.
For C, I can tell that both authors agree that it's OK for investors to gain an advantage by superior stock analysis because of lines 11-15 (Passage A: "If you analyze a stock, decide that it's overvalued, and sell it...it means you've done your homework") and lines 40-42 (Passage B: "Success in the market can then be gained only by skill in analyzing the info"). So, although author A is OK with insider trading and author B isn't, they both think it's okay for some people to be better at analyzing stock info than others.
I had trouble ruling out answer B because I thought that both authors would agree that in an ideal world, all info would be available to all stock market participants at the same time. Author A says that "stock markets work best when all the relevant info about a company is spread as widely as possible, as quickly as possible" (lines 16-18) and that people should act on the info they have right away, so that stock prices have a "more accurate assessment of all the relevant facts" (lines 27-29). Am I interpreting this incorrectly? Any clarification would be appreciated.
Author A thinks that all info should be available to all participants at the same time because of their definition of transparency and how it is a basic principle of the stock market: "In a transparent market, info that influences trading decisions is available to all participants at the same time" (lines 38-40).
Thanks