A 22-year-old woman presents with vaginal itching and erythema as well as a discharge which is thick and white. External erythema is also present with discrete pinpoint lesions off the edge. The discharge pH is 4.7 (normal). Amine test is negative as is the genetic probe test for Neisseria. What is the most likely cause?
A) Bacterial vaginosis B) Overgrowth of Gardnerella vaginalis C) Trichomonas vaginalis D) Chlamydia trachomatis E) Candida albicans