All of the Following Are Ways to Best Control the Magnification

All of the following are ways to best control the magnification of the microscope EXCEPT which statement?

A) To examine part of the specimen at higher magnification, move that part of the slide to the center over the aperture before changing to a higher-magnification lens.
B) To examine part of the specimen at higher magnification, move that part of the specimen off to the side.
C) Always use low magnification during your initial observation.
D) Use a drop of immersion oil to look at the specimen under the highest magnification.