The answer would be Option D: more bone
Answer:The insurance that pays first (primary payer) pays up to the limits of its coverage. The one that pays second (secondary payer) only pays if there are costs the primary insurer didn't cover. ... If your employer insurance is the secondary payer, you may need to enroll in Medicare Part B before your insurance will pay.
Explanation:
Food moves through the digestive system tract by peristalsis, which is produced by wavelike contractions of INVOLUNTARY muscles
