Answer:
The sentence that is punctuated correctly is sentence A.
Step-by-step explanation:
When you have a conjunctive adverb linking two independent clauses, you should use a semicolon. In this case, the conjunctive adverb connecting the two clauses is consequently. As you can see, there is a semicolon before the conjunctive adverb and a comma after it. The comma following the conjunctive adverb indicates that this word is in initial position in the clause.