3. Why do chemicals hazardous to one's health?
a. caused by organisms such as viruses, bacteria, fungi and parasites.
b. because a solid, liquid, vapor or gaseous substances, dust, fume or mist.
c. because the worker, such as repetitive and forceful movements, vibration, the extreme temperatures, and awkward postures arising from improper work
d. because inadequate and insufficient machine guards, unsafe workplace conditions, and unsafe work practices.​