<span>Using cell phones during school hours is not allowed.</span>
1. Therefore
2. All in All
3. However
4. In spite of
5. For example
6. Nevertheless
7. Simply because
8. In addition
9. For instance
10. For this reason
11. Further
12. Given These points
13. Along with
14. Indeed
15. That is
Bonus: Morever
It would be B because the underlined part doesn't need anything else added on therefore it is indepedent
