A 24-year-old woman presents with a 1-week history of thin, green-yellow vaginal discharge with perivaginal irritation. Physical examination findings include vaginal erythema with petechial hemorrhages on the cervix, numerous white blood cells, and motile organisms on microscopic examination. These findings most likely represent:
A. motile sperm with irritative vaginitis.
B. trichomoniasis.
C. bacterial vaginosis.
D. condyloma acuminatum.