Concept:Inheritable traits are controlled by genes and can be passed from parents to offspring.Explanation:The ability to taste PTC is controlled by a dominant gene, so it is inheritable. Tongue rolling is also a well-known genetic trait. The ability to move the ear may also have a genetic basis in some individuals. On the other hand, rolling the eyeball is usually a voluntary, learned action rather than a gene-controlled trait. Therefore, it is not truly inheritable.Answer:D. roll the eyeball.