The pre writing stage of the writing process include selecting a subject, setting a purpose and DETERMINING THE MAIN IDEA OF YOUR ESSAY AND ORGANIZING YOUR IDEAS AND FACTS IN A WAY THAT DEVELOP YOUR MAIN IDEA.
Pre writing stage is the phase of the writing process which involves gathering and selecting of ideas to write on.
Maybe google this one? You would probably get better answers
The answer is the third sentence: "Finally take care to put away all your supplies and clean your workstation, so you are ready for your shift in the morning." because the word 'so' is a conjuction.