Here's why: A. hyphen/dash- it doesn't make sense. B. It's the correct answer. They are two independent clauses, and semicolons combine those sentences into one. C. Dashes are used for lists. Not independent clauses. D. Commas won't work, UNLESS you add something else, maybe. depends on what you add. But since that isn't a choice, it's b.
The correct answer is B because a semicolon is used between 2 closely related independent clauses, provided they are not already joined by a coordinating conjunction
