The correct answer would be not until they tuen 21 but in the USA I believe it is permissible for teenagers (minor) to consume alcohol in rationed amounts under the direct supervision of a parent/ guardian. So option A in this case.
If Evander wants to compete in a bodybuilding competition some questions he should ask when selecting a product is if the source is credible, if the information provided is then accurate and also if the product is cheap since it can also affect as how many can he purchase on that product.