answer="a"

Knowing that you will revise your essay once you have finished writing it, allows you to write freely without too much concern for style. You need to tell yourself that it doesn't matter if you don't get the wording exactly right on the first attempt. The emphasis should be on allowing your thoughts to flow freely, while you follow your plan and develop your ideas. The key to success here is to remind yourself that the best writing reads as though it is talk in print.

After this, when you move into the revision stage, you can clean up your work. Ideally, you should leave your first draft a few days. If you revise it straightaway, you may miss things that need to be changed. You may be so delighted to have got it out of the way, that your powers of self-criticism may have become blunted.