Before viewing prepared slides under a microscope, students should review the safety rules for

In every laboratory that uses it for experimentation, it is very important that users of the laboratory must be oriented about their safety and the code of the laboratory. For one, it will allow you to be alert at all times when using for example, an unknown chemical. Two, it will help you understand how to use the apparatus present inside the laboratory. Three it will protect you against unforeseen events. So before viewing prepared slides under a microscope, the students should review the safety rules if there are accidents such as; cutting yourself from the prepared slide, informing the professor if the prepared slide is broken, asking the laboratory-in-charge for assistance on how to use the microscope. That way, the flow of the class will run smoothly.

Sorry its not enough info

The answer would be d. pili