It's heading 2 or 3, because heading 1 is considerd as too big for slide presentations.
It would be A because B could be answered best with a poll graph, C with a pie graph, and D with a bar graph. Line graphs typically show speed and rate so A makes the most sense, but you are still able to do the other questions on a line graph.
Boolean search would be the answer
Yes ma’am , can of spam. what she said up there ^*
Answer:
OB. by zooming in on them
hope it helps