Question

when you use microscope always do the following to ensure optimal performance and care-
start your examinations with the high - power objective in place.
always carry your microscope upright with both hands - one hand under the base and the others around the microscopes arm.
after shifting to the high - power objective, always use only the course adjustment to focus image.
i do not know

Explanation:

When using a microscope, starting with the high - power objective is incorrect as it makes it harder to find the specimen. After shifting to high - power, using only the course adjustment can damage the slide or objective. Carrying the microscope upright with both hands (one under the base and one around the arm) is the correct safety and handling procedure.

Answer:

B. Always carry your microscope upright with both hands - one hand under the base and the other's around the microscope's arm.