Bacteria That Cause Periodontal Disease Have Adhesins for Receptors on Streptococci

Bacteria that cause periodontal disease have adhesins for receptors on streptococci that colonize on teeth. This indicates that

A) Bacteria that cause periodontal disease adhere to teeth.
B) Streptococci cause periodontal disease.
C) Streptococci get bacterial infections.
D) Streptococcal colonization is necessary for periodontal disease.
E) Bacteria that cause periodontal disease adhere to gums and teeth.