Which is the correct option to complete the paragraph below ?

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                                   How to Succeed in High School - Studying at Home

In order to be successful, set regular study and homework hours. Making this part of your routine creates a positive pattern for success. Create a well-lit study area. _______ a CD player if you _______ it helps you stay focused. Otherwise, highlight the space with yellow and other upbeat hues that may help keep your mind fresh.

(Adapted and abridged form http://teenadvice.about.com).
Which is the correct option to complete the paragraph below ?
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