I think it is C, because if I'm right present principal is something that is happening presently? If so, C would be the answer because they "are doing" the exercises right now in context.
Answer:
yeah he is correct. Kielburger provides this evidence to show the affects that poverty has on children.
A claim you are trying to prove. Topics and evidence to support those topics/points. Reasoning to support evidence
These lines would best fit an old, philosophical doctor based on his language use. A farmer and uneducated trader and a vagrant wouldn't be able to speak in such a manner probably.