Select the sentence that uses the semicolon correctly to separate independent clauses. A. The university student center opened for only two​ hours, clearly; there must have been some emergency. B. The university student center opened for only two hours.​ Clearly; there must have been some emergency. C. The university student​ center; opened for only two hours.​ Clearly, there must have been some emergency. D. The university student center opened for only two​ hours; clearly, there must have been some emergency