A PPO insurance is better than an HMO when someone needs to see a specialist.Specialist means: A. Someone who more aware about a certain subject B. To concentration on a certain field C. To be knowledgeable in a certain area of stud D. All of the above - Vocabulary | English Grammar Quiz

A PPO insurance is better than an HMO when someone needs to see a specialist.

Specialist means:

A. Someone who more aware about a certain subject
B. To concentration on a certain field
C. To be knowledgeable in a certain area of stud
D. All of the above

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