I've noticed that there are many threads posing SAT Writing questions. It may be more helpful if we consolidate further posts on the topic into one thread.
Feel free to post any Writing questions that you have. Be sure to include the answer choice if you have the key, and I or another informed poster will attempt to explain why the answer is what it is and may also communicate a more generally applicable rule that will help in answering similar questions.
If you post error-identification questions, enclose the potential answer choices in parentheses for ease of reading.
(About me: I'm currently a junior in high school, but I scored a perfect on the MC choice portion of the SAT Writing section two years ago.)