I believe part A. is C. and part B would be A. or D. Sorry if this doesn't help
Langues chose, style of writing, and length of writing would be my answers.
tell me if i'm wrong
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For example, if you sign up for a credit card, you may think the bold print is good, but the small print may reveal that the interest rates are not what they need to be. Secondly, it could put you into a lot of debt if you click the I agree button, but you didn't know that they can lower your credit score, or even totally damage it.