The arm and hand of human, the paw of a cat, and the wing of a bat look similar when they are viewed in an x-ray. What do scientists conclude?
Group of answer choices
A. Humans, cats and bats are all the same species.
B. Humans, cats and bats have a common ancestor.
C. Humans and cats evolved from bats.
D. Humans and cats can fly if they work hard enough to acquire that trait.
