Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: A plant has yellow flowers. What best explains why the flowers are yellow?
The flowers of the parent plants were yellow.
The flowers contain pigments called carotenoids and xanthophylls, which give them a yellow color.