Question

multiple - choice question
what do you have to be careful of when moving the stage up?
not to knock off the specimen.
not to bang into the objective and break it.
rewatch

Explanation:

When moving the stage up in a microscope - related activity, the main concern is to avoid crashing the stage into the objective lens which can break it. Knocking off the specimen is also a risk but the more critical and immediate danger is damaging the expensive objective.

Answer:

B. Not to bang into the objective and break it.