The correct answer is: A. dealing improperly.
Double dealing is the act of behaving in a way that is dishonest or deceitful. It can also mean to act in two different ways towards the same person or group of people, depending on what you want from them.
Option B, deception, is a synonym for double dealing. It is the act of deceiving someone, or of deliberately misleading them.
Option C, two standards, is not the correct answer because it does not refer to the act of behaving in a dishonest or deceitful way. It can mean to have different standards for different people or groups of people, but it does not necessarily mean that you are being dishonest or deceitful.
Option D, two jobs, is also not the correct answer because it does not refer to the act of behaving in a dishonest or deceitful way. It can mean to have two jobs at the same time, but it does not necessarily mean that you are being dishonest or deceitful.