Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) To obtain the total magnification, multiply the power of the objective lens by the power of the condenser.
B) When observing a densely stained slide on oil, move the condenser all the way down and close the iris diaphragm.
C) To obtain maximum magnification, immersion oil is added when using the 45´ objective.
D) You should focus a specimen under the 100´ objective with only the fine-focus adjustment knob.