Why Are Seeds Especially Nutritious

Why are seeds especially nutritious?

A) They contain all the adult plant nutrients packed into a tiny package.
B) The embryo alone contains all the same nutrients as an adult plant.
C) The seed coat is packed with nutrients to support the embryonic plant and endosperm to give them a good start in life.
D) The endosperm in a seed is especially packed with nutrients in order to give the embryonic plant a good start in life.
E) They are full of fiber to support the development of the endosperm.