Diversification is good for shareholders. So why shouldn?t managers acquire firms in different industries to diversify a company? (Select all of the choices that apply.) A. Shareholders can efficiently achieve diversification on their own by purchasing shares in different companies. B. When managers achieve diversification by creating a conglomerate through purchasing other companies it is often done at a premium over market prices C. Because it may be harder to measure performance accurately in a conglomerate, agency costs may increase and resources may be inefficiently allocated across divisions. As a result, it is cheaper for investors to diversify their own portfolios than to have the corporation do it through acquisition. D. While it is true that individual investors can diversify on their own, it is usually more expensive than letting the two firms merge and then buying one set of shares rather than two