If Two Parents Have Brown Eyes, but Each of Them

Multiple Choice

If two parents have brown eyes, but each of them also has a recessive gene for blue eyes in their genotype,

A) none of their children will have blue eyes.
B) there is a 1-in-4 chance that one of their children will have blue eyes.
C) there is a fifty-fifty chance one of their children will have blue eyes.
D) we cannot predict what color eyes their children will have.