Answer: A."The first cranial nerve is olfactory and is assessed by verifying the ability to smell and differentiate odors. Clients are asked to occlude one nare while smelling through the open nare. Then the other nare is checked. Nurses need to be aware of how to properly perform an assessment. If you believe that you are assessing one cranial nerve, but are actually assessing a different one, then you will report incorrect data to the rest of the healthcare team."