Some animals are able to regenerate new animals entirely from a piece of them. It is not as common among starfish, but worms, sea cucumbers, and sponges can regenerate new animals. If a flat worm, for example, is cut into pieces, each piece will grow into a new worm. Sea cucumbers can also multiply after being cut into pieces. Their bodies can be up to three feet long, and each new piece, after being cut, can become a new sea cucumber. And if sponges are divided, the sponges’ cells will regrow and combine in the exact same way they did before being divided

what is the best summary for this paragraph?
A. Some animals can regrow new animals from one piece. A new worm or sea cucumber can grow from one piece of an old one. Divided sponges regrow to be exactly how they were before the division.
B. Some animals can regrow new animals from a small piece of an old animal. If a flat worm is cut up, each piece will grow into a new worm. It is exactly the same way that sea cucumbers can regenerate.
C. Flat worms can be grown from pieces of another flat worm. So if a flat worm was cut into four pieces, four flat worms would grow—one from each piece. Sponges do not regenerate in the same way.
D. Animals like sea cucumbers can grow from a piece of the same kind of animal. Sea cucumbers are about three feet long. If they are cut up, new sea cucumbers will grow from each old piece.