The Following Are All Guidelines for Proper Use of a Microscope

Multiple Choice

The following are all guidelines for proper use of a microscope EXCEPT which statement?

A) Completely unwind the electrical plug before plugging it in.
B) Store the microscope with the low-power objective lens in position.
C) When cleaning the lens of a microscope, use water and a paper towel.
D) Carry the microscope with two hands at all times.