You Are Constructing a Phylogeny of a Hypothetical Group of Insects

You are constructing a phylogeny of a hypothetical group of insects. Several of the species have a pattern of four veins on the forewing while another group of species has a pattern of six veins. The three outgroups in your analysis all have a pattern of six veins. From this you can conclude that

A) the trait of having six veins is a synapomorphy.
B) the species with six veins are more closely related to each other than they are to the any of the species with four veins.
C) the trait of having four veins is a synapomorphy.
D) a and b
E) b and c