Answer:
The option that correctly combines the two sentences is B.
Step-by-step explanation:
When you have a conjunctive adverb linking two independent clauses, you should use a semicolon. Then, after the conjunctive adverb, you should include a comma as it also functions as the introductory word to the second clause. That is why option B is the correct choice. There is a semicolon before the conjunctive adverb however and a comma following it.