Hi! It appears you have asked the same question twice. I will quote my answer to the same question you already posted:
"the only sentence which uses semicolon correctly is the first sentence, option A!
- A. Chris and Molly were delighted to see the whole family gathered in the living room; the group was waiting to congratulate the couple.
We use semicolons in sentences between two independent clauses instead of a transitioning or linking word (conjunctions). "
Hope this helps!