A patient was diagnosed with gas gangrene infection which is caused by a certain species of bacteria. His treatment included exposure to high levels of pure oxygen in a pressurized room (Hyperbaric oxygen therapy). Based on the information provided, we can conclude that the bacteria that causes gas gangrene infection is an:
a. Obligate anaerobe
b. Obligate aerobe
c. Facultative anaerobe
d. Microaerophile