A Man with Syndactyly,an Autosomal Dominant Condition,has One Child Who

A man with syndactyly,an autosomal dominant condition,has one child who also has syndactyly.His unaffected wife states "Since the risk for having a child with this problem is 50% and our first child has the problem,the next child will not be affected." What is the best response to this statement?

A) "That is not quite true because the risk is 50% with each pregnancy,so all future children you have would have a 50% risk."
B) "That is not quite true because you could also have the mutation but not show the problem if there is variable expressivity."
C) "That is correct but if you have more than two children half of them will have syndactyly,and 50% will not have it."
D) "That is correct and if you only have two children,the second one will not have syndactyly."