The ACT English & SAT Writing tests aren’t all about grammar – style and clarity also matter! When you’re working through a question, if all the choices seem grammatically correct, than you’ll have to look for other reasons to eliminate choices. In short: look for choices that use proper word choice (diction), are clear (clarity), and are conscise (a.k.a. not wordy).
Here’s a sample question to try; then view the video for a discussion.
Note: This question comes from ACT English, but you should try this question even if you’re taking SAT Writing since you’ll see similar questions on your test as well!