A simile is when you compare one thing to another by using <em>like</em> or <em>as</em>. There's an <em>as</em> in the second one "as easily as sliding a knife...".
A metaphor is when you say something <em>is</em> something, not just like it. "[his] face became a white sheet".
An allusion is making a comparison to something the audience knows about, like comparing a rivalry to rock paper scissors (this particular one implies the speaker always wins).
B. It has a comma after "all right" and "P.M." is correctly written. It has dots after the letters bc it's an abbreviation.
A. is the correct answer.
A. <span>Christine ran slower than her sister.
<em>Slower </em> is comparing Christine's speed to the speed of her sister.
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