An Important Adverse Effect of Tetracycline Is

Multiple Choice

An important adverse effect of tetracycline is:

A) that it can cause temporary brown staining of the teeth, tongue, and resin restorations.
B) that it is less effective against periodontal disease because many periodontal pathogens are resistant to it.
C) that it interferes with the effectiveness of birth control pills.
D) none of the above.