Question

of the following choices, which action could cause the most permanent physical harm to you?
force - ejecting a stuck dvd disc using a straightened paper clip.
using a computer without a surge protector.
looking into the end of a fiber optic cable.
wearing a grounding strap while installing a modem.

Explanation:

Looking into the end of a fiber - optic cable can expose the eyes to intense light that may cause permanent damage to the retina. Force - ejecting a stuck DVD with a paper clip may damage the DVD drive but not cause permanent physical harm to a person. Using a computer without a surge protector may damage the computer but not directly cause permanent physical harm to a person. Wearing a grounding strap while installing a modem is a safety measure and does not cause harm.

Answer:

Looking into the end of a fiber optic cable.