A 4-day-old infant shows symptoms of conjunctivitis. A Giemsa stain of the conjunctival scraping shows perinuclear cytoplasmic inclusions. This organism is most likely
A) C. trachomatis serovars A, B, Ba, C. B) C. trachomatis serovars D-K. C) C. trachomatis serovars L1, L2, L3. D) C. pneumoniae.