Answer:
option A is the correct of answer of given statement which is volume
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
A since the sense of fulfilment will bring about more encouragement to continue studies