D. He uses the title of the poem throughout the song.
Jonas Salk<span> </span><span>was an American </span>medical researcher<span> and </span>virologist<span>. He discovered and developed one of the first successful </span>polio vaccines in the 1950's.
Hope I helped. :)
I think the answer is B. On the map the Canadian shield surrounding Hudson Bay seems to be the largest geographical region in Canada.
