Researchers believe that newborn reflexes disappear gradually as a result of development of the

The answer is a gradual increase in voluntary control over behavior as the cerebral cortex develops. Infant reflexes are responses that are normal in infants, but abnormal in other age groups.  A reflex that is still existing after the age when it would normally disappear can be a sign of brain or nervous system harm. 

"choosing is refusing" means individuals face an opportunity cost with each decision they make. economists state that every decision involves trade-offs. opportunity cost is the least desirable alternative given up as a result of a decision.

answer; i believe the correct answer is (general);