Correct option is C
Statement:
Talk to everyone politely even if your social status is high.
Assumptions (I): Generally, people do not speak politely after gaining high social status.
The statement suggests that politeness should be maintained even with high status.
This means it assumes that some people become less polite when they gain high status.
So, this assumption is correct.
Assumptions (II): One's social status might decline someday.
The statement does not say anything about social status declining.
It only talks about how to behave regardless of status, not about losing it.
So, this assumption is incorrect.
Thus, correct option is (c).