Answer:

A.Stage

Explanation:

Microscope Stages. All microscopes are designed to include a stage where the specimen (usually mounted onto a glass slide) is placed for observation. Stages are often equipped with a mechanical device that holds the specimen slide in place and can smoothly translate the slide back and forth as well as from side to side

B. Body Tube

• Body tube is a mechanical part that connects the eyepiece and the objectives held in place by the nosepiece.