Stella Has Two Adult Children,Fred and Ethel

Stella has two adult children,Fred and Ethel.Fred was married,but his wife has died.They had one child.Rita.Ethel was also married,but she has died.Her husband Ed is alive,as is Ethel and Ed's child Betty.If Stella dies intestate,how is her estate distributed?

A) all to Fred
B) to Fred and Ed equally
C) to Fred, Ed and Betty equally
D) to Fred Rita and Betty equally
E) to Fred, Ed, Rita and Betty equally