Answer:
A.
Step-by-step explanation:
Determining whether a good is normal or inferior depends on individuals. When there is a rise in the income of a person and he/she buy more of a good, it shows that good is normal. When there is a rise in a person income and there is a decrease in the demand for goods, then the product is inferior.
Therefore, it is an individual who determines whether a good is normal or inferior. Thus option A is correct.