Most of the Bacteria Involved in Periodontal Disease Are Obligate

Most of the bacteria involved in periodontal disease are obligate (strict) anaerobes.Predict why this is the case.

A) Mouthwashes and toothpaste destroy most of the strict aerobes that are found on teeth.
B) The crevice area between the gingiva and the tooth is low in oxygen.
C) Sugar and other carbohydrates used by the oral bacteria can be easier broken down without the presence of oxygen.
D) The mouth is very low in oxygen.