Answer:
A person is in complete control over the class he or she is in. Hard work (or lack of it) determines class.
Step-by-step explanation:
Stratification system means there is category and rank of people on basis of wealth, income, capital , education and so on. This is social class system in which people ranked according to their wealth and power. US justify that a person has full control over his class he or she has , because wealth comes from hard work and diligent.