Concrete operations are
a. reversible.
b. not systematic.
c. illogical.
d. a vestige of infancy.
Answer: a. reversible.
Psychology
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Sexual activity involves
a. the parasympathetic nervous system only b. the sympathetic nervous system only. c. both the parasympathetic and sympathetic nervous systems. d. neither the parasympathetic nor the sympathetic nervous system.
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______ is more heavily affected by HIV and AIDS than any other region in the world.
A. Latin America B. California C. Africa D. Asia
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