Fighting will happen soon and Caesar will not be a fit leader. What event does Casca say will take ...
The correct answer is B. It used literary excerpts to illustrate word usage.
Johnson used excerpts from well known books to show how different words are used which was a completely new idea, revolutionary one, since the previous dictionaries showed what the word mean and were sometimes difficult to understand.
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.
Skimming I believe, so C. Hope I helped