Rayed Craters Like Tyco and Copernicus Are Known to Be

Rayed craters like Tyco and Copernicus are known to be younger than the lunar maria because ________.

A) they have been dated directly by radiometric dating of samples
B) they are formed on lunar highlands that are known to be younger than the maria
C) they contain volcanos in their centers which indicate the moon still had magma available when they formed
D) their ejecta,seen as rays,lies across the surface of the maria