Members of Genus X, a Hypothetical Taxon of Invertebrates, Have

Members of genus X, a hypothetical taxon of invertebrates, have antennae with a variable number of segments.Species A and B each have ten segments; species C and D each have nine segments; and species E has eight segments.In all other genera in this family (including genus Y) , all species have antennae with ten segments.Which character state is a synapomorphy that would be useful for determining evolutionary relationships within genus X?

A) Ten-segment antennae in species A and B
B) Ten-segment antennae in genus Y and in two species of genus X
C) Antennae with fewer than ten segments in species C, D, and E
D) Eight-segment antennae in species E
E) Antennae with more than ten segments in any species