Your Roommate at College Complains of a Sore Throat, Fatigue

Your roommate at college complains of a sore throat, fatigue, fever, cough, and chest pain. She thinks she has a cold, although she has not had a runny nose or any sneezing, and she has been feeling bad for more than a week. You persuade her to go to the urgent care, which she does. She comes home with a prescription for penicillin, telling you that she was told that she likely has pneumonia, caused by Streptococcus pneumoniae. She takes the penicillin according to instruction but doesn't feel any better, so she goes back to the urgent care facility. This time, the physician's assistant on shift takes a sputum sample and sends it for analysis. He also prescribes tetracycline for your friend. This antibiotic targets protein synthesis. Your friend takes the medication and recovers fully.
-You are a microbiology student. You tell your roommate that Streptococcus pneumoniae 

A) is a bacterium that appears as round cells when viewed with a microscope.
B) is a virus that appears as round cells when viewed with a microscope.
C) is a bacterium that appears as rod-shaped cells when viewed with a microscope.
D) is a protozoan that appears as round cells when viewed with a microscope.
E) is a virus that cannot be viewed except with an electron microscope.