The Figure Shows the Pedigree of a Family

The figure shows the pedigree of a family. Dark-shaded symbols represent individuals with one of the two major types of colon cancer. Numbers under the symbols are the individual's age at the time of diagnosis. Males are represented by squares, females by circles. Based on this pedigree, this trait is most likely inherited ________.

A) by older individuals
B) as a recessive trait
C) as a result of epistasis
D) as a dominant trait