E.
Aside from being rich in vitamin C, Ruby Red grapefruit also contain vitamin A, potassium, dietary fiber and other nutrients. But the discovery of the mutated red-fleshed, sweet-flavored Ruby Red grapefruit tree changed all that, and gave birth to the great Texas grapefruit industry. From that moment on, grapefruit has become one of America’s favorite breakfast staples.It is a bud sport (mutation of one tree limb that bears fruits that have different characteristics than the rest of the tree) that grew on the limb of a Pink Marsh grapefruit tree.