Patho question: In order for an individual to be considered as a carrier, they must be

In order for an individual to be considered as a carrier, they must be?

A. Heterozygous for an autosomal dominant gene mutation

B. Homozygous for an autosomal dominant gene mutation

C. Homozygous for an for an autosomal recessive gene mutation

D. Heterozygous for an autosomal recessive gene mutation.

For my Pathophysiology class!!

D. If it was dominant they would have it and if it was homozygous recessive they would have it.

D. Heterozygous for an autosomal recessive gene mutation.

I agree with @Maddi, it's D.