C. Have a buddy or someone to talk with and review your writing.
<em>One very popular hobby </em>is C) a complete subject.
A complete subject consists of more than one word, and since there are four words that make up the subject, it is complete, and not simple.
I believe it is taking notes because you would want to add what the speaker was saying, his actions, and body language.
Hope this helps.
B) according to the instructions
<h2>⛈How? </h2>
→As the pharse "according to to instructions" can join two sentence or word.
