What is the recommended distance for imaging the cross-table swimmer's lateral?

All of the following occur during the invasion and multiplication stage of infection except:

A) pathogen enters the body. B) pathogen begins multiplication. C) signs and symptoms begin to appear. D) All of the above

Which of the following support and position the specimen and prevent contamination of the microscope by the specimen? 

A. Coverslip and slide B. Stage C. Substage D. Focus controls E. Objectives