Select the correct answer from each drop-down menu.

Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for breathing, while whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for______
A: Body structure, but their breathing structure evolved from different ancestors
B: Both body and structure and breathing
C: Breathing structure, but not heir body structure evolved from different ancestors

Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales____
D: have legs inside their bodies
E: Evolved from organisms with legs
F: will have legs in the future

I would very much appreciate an answer for both. Thank you so much