What evidence do vestigial organs provide to support the idea that life changes over time?

a. these organs likely had a function in an ancestral organism but no longer appear to have a purpose in the modern descendant organism

b. these organs scientists classify related species, even after they have drastically changed over time.

c. these organs likely never had a function but may take on an important function in the future of the species.

d. these organs had one purpose in an ancestor of the species and have adapted over time to serve a new purpose in the descendant species.