Which of the Following Are Functions And/or Responsibilities of the United

Which of the following are functions and/or responsibilities of the United States Occupational Safety and Health Administration (OSHA) ?
1) Functions as a monitoring agency in places of employment,predominantly in industry
2) Regulates occupational exposure to radiation through Part 1910 of Title 29 of the U.S.Code of Federal Regulations (29 CFR 1910)
3) Responsible for regulations concerning an employee's "right to know" with regard to hazards in the workplace

A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) 1,2,and 3