If Both Parents Express a Particular Trait, but Their Child

Multiple Choice

If both parents express a particular trait, but their child does not, what does this indicate about the trait?

A) The trait is an autosomal dominant trait.
B) The trait is an autosomal recessive trait.
C) The trait is sex-linked recessive.
D) The trait is sex-linked dominant.
E) This is a lethal trait.