Deas cause he threatens to have Ewell arrested if he doesn't leave Helen alone.
The answer is b) Pablo used the computer
A word that can function by itself as a noun phrase and that refers either to the participants in the discourse (e.g., I<span>, </span>you<span> ) or to someone or something mentioned elsewhere in the discourse (e.g., </span>she,it<span>, </span>this<span> ).</span>
I know that the answer to this question is none of the above.
D. You need to have a semicolon or it will become a comma splice.