Which is the best answer here?
Whether or not we have chosen to use our licenses since then. They remain of enormous value to us.
Which of the following is the best way to write the portion of these sentences? If you think the original is the best way. choose option 1.
1. since then. They remain
2. since then, and they remain
3. since then they remain
4. since then; they remain
5. since then, they remain
Please help thanks.