All of the Following Statements About Cost Controls in Dental

All of the following statements about cost controls in dental insurance plans are true EXCEPT

A) The coinsurance percentage used may vary by type of dental service.
B) Cosmetic dental work is usually excluded.
C) The limit on benefits may be expressed as an annual limit or as a lifetime limit for certain types of dental services.
D) To eliminate small claims,there is no coverage for routine oral examinations,X-rays,or cleaning teeth.