Which observation best shows: 1. Both have elongated bodies, flippers, tail flukes, and external hind...

Which observation best shows:
1. Both have elongated bodies, flippers, tail flukes, and external hind limbs.
2. Basilosaurus and modern whales both have limbs. One is external, the other internal.
3. Both have elongated bodies, flippers, and tail flukes.
4. Both have elongated bodies, flippers, tail flukes, and internal hind limbs.