When Using the Mucous Membrane for Percutaneous Medication Administration,the Nurse

When using the mucous membrane for percutaneous medication administration,the nurse should use an oily base for medication absorption when which of the following is true?

A) The mucous membrane is too dry,and skin will flake off.
B) The patient is allergic to oil-based preparations.
C) The medication needs a slow absorption.
D) The medication needs a rapid absorption.