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 the "right to know" of employees with regard to hazards that may be present in the workplace

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