Read the excerpt from "If-" by Rudyard Kipling:

"If you can dream—and not make dreams your master;
If you can think—and not make thoughts your aim;"

What is emphasized by the dashes in these lines?

A. The contrast between the two ideas presented in each line.
B. The impossibility of what the speaker is suggesting.
C. The importance of looking for connections between ideas.
D. The similarity between the ideas in the two lines.