Answer:
semicolon
Explanation:
The semicolon is usually the correct punctuation mark to link independent clauses and avoid the mistake called comma splice (i.e., splicing independent clauses as if they were a single clause, resulting in confusing sentences).
Example: Mark thought it would be a good idea to bring pizza; however, his wife had entirely different plans.
The two clauses are independent because they each contain a subject (underlined in the example) and a predicate (italicized in the example). The semicolon goes at the end of the first clause, followed by the conjunctive adverb, after which a comma is placed before the second clause.
