Refer to the Figure

Refer to the figure.
The fruit fly Drosophila neotestacea carries a bacterial symbiont; the fly can also be infected by a nematode worm. The figure shows the number of eggs produced by female flies that are or are not infected by the nematode and that have or do not have the bacterial symbiont.
-According to the figure, the bacterial symbiont

A) reduces the fecundity of female flies infected by the nematode.
B) increases the fecundity of female flies infected by the nematode.
C) increases the fecundity of female flies not infected by the nematode.
D) increases the transmission of the nematode.