Which of the Following May Be Considered a Hazardous or Harmful

Which of the following may be considered a hazardous or harmful environment?

A) One in which the likelihood of being struck or falling, is great.
B) One in which exposure to chemical or physical agents could result in the development of a disease or illness.
C) One in which the likelihood of overexertion is great.
D) One in which stress-related injuries are possible.
E) All the above