Below Is a Pedigree for a Particular Human Trait

Below is a pedigree for a particular human trait. Affected individuals are illustrated by the shaded in circles or squares. This particular pedigree does not yet have a particular shading pattern for carriers. As a result, some of these individuals may be carriers for the trait. What is the mechanism of inheritance of this trait?

A) Sex-linked recessive
B) Autosomal dominant
C) Autosomal recessive
D) Mitochondrial