What gives states the right to enact laws protecting, among other things, morals?

What gives states the right to enact laws protecting, among other things, morals?
 
  a. The U.S. Constitution c. Police Power
  b. The Magna Carta d. The Commerce Clause

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A document containing job title, duties, responsibilities, and qualifications for employment is called
 
  a. a position classification.
  b. a job description.
  c. an equal employment opportunity form.
  d. an assessment form.

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A Good Samaritan law
 
  a. makes it a crime for a bystander to fail to come to the aid of another in serious peril if to do so would not put the bystander in harm's way.
  b. rewards persons who render assistance to strangers.
  c. protects persons who refuse to assist another individual who is in peril.
  d. limits the duty that strangers owe to victims of violent crimes.