Which of the following most logically completes the argument? A. Any boost in the level of the alpha form in a person's body will tend to suppress the level of the gamma form in that person's body. B. The alpha and the gamma forms can easily be combined in a stable form suitable for use in vitamin supplements. C. There are some foods containing high levels of the gamma form that are not a part of most people's diets. D. People who take vitamin supplements are more likely to maintain a diet containing high levels of the gamma form than are people who do not take vitamin supplements. E. In the process currently used to manufacture vitamin E supplements, the gamma form of the vitamin is actually removed as a result of steps taken to purify the alpha form.