Marion's Mother Has Red-Green Colour Blindness,but Her Father Does Not

Marion's mother has red-green colour blindness,but her father does not.What can we predict about the colour vision of Marion and her brothers?

A) Marion is colour blind, but her brothers' colour vision is normal.
B) All the children in this family are colour blind.
C) All of Marion's brothers are colour blind, but Marion's colour vision is normal.
D) None of the children in this family are colour blind.