The answers are B,C, and F the other person in incorrect
Yes you can use we to refer to the audience, with you in it, because using we groups together a group, like "We the people..."
Your answer is: Yes.
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The passage used a combination of comparison and contrast and: <span> C. cause and effect.
</span>The passage give us a well descriptive explanation on how the microorganisms (the cause) developed in such a way to the point where their fossils ended up as a petroleum/coal (effect)