Answer:
D. Read the essay aloud to hear where words are missing or awkward phrasings or grammatical errors occur
Step-by-step explanation:
The best way to catch errors in your essay is to read it aloud. This forces you to read it slowly and this will help you catch errors. In addition, you will be able to hear how it sounds when you speak which means you'll be more apt to catch any part of your essay that sounds wordy. Never rely solely on the computer's spell-checker, because it only catches the simplest of errors.