Final answer:
An employer group dental insurance plan usually provides coverage for preventive care and places limits on certain procedures, but typically does not cover cosmetic treatment.
Step-by-step explanation:
An employer group dental insurance plan usually provides coverage for preventive care for up to 2 visits per year, as well as places limits on procedures such as braces and appliances. However, cosmetic treatment is typically not covered under such a plan.
Therefore, the correct answer is:
- Coverage for cosmetic treatment.