What’s the difference between myth and legend?

What’s the difference between myth and legend?
A.A myth is a story that has less facts and evidence recorded to support the story.
B.A legend is a story that has no real evidence to back it up.
C.A myth is a story that has no facts and evidence recorded to support the story.
D.A legend is a story that has more real evidence to back it up.
正确答案：A legend is a story that has no real evidence to back it up.