Well, despite the fact that you haven't provided me with sentence 8 for review, I can -- fortunately for you -- say that option B MUST be the correct answer ... based solely on pure logic and a strong command of English.
Answer:
<u>Independent clause</u> can stand alone as a sentence because it expresses a complete thought.
Independent clause is consist of a subject and verb, which is making complete sense on its own and can be used alone as a coherent sentence. On the other hand dependent clause is consist of a subject and a predicate, which makes incomplete sense when used alone.
You might want to include pg 108 to this question
Hello it's me again.Thats a good topic sentence