The mother's blood supply and the embryo's blood supply A. Always flow together
B. Mix in the umbilical cord
C. Sometimes flow together
D. Are kept separate

What are the symptoms of trichomoniasis in males? a. painful urination, a dark discharge from thepenis, with no itchingb. painful urination, a dark discharge from thevagina, with no itchingc. painful urination, a clear discharge from the vagina, and some itchingd. painful urination, a clear discharge from thepenis, and some itching