Pretty sure the answer is A
Answer: to help you answer this i would need more information
Im only in middle school, but what about whats going on in todays would versus back when your parents were young??
I would say that the pair of lines from the passage that contains a change in intonation is the first one:
But all the time / I'se been a-climbin' on
Because it shows a change in the tone of a poem.