Which sentence shows proper placement of the semicolon to combine the independent clauses? lions like to sleep up to 21 hours per day. they need to conserve their energy. a. lions like to sleep up to 21 hours per day they need to conserve; their energy. b. lions like to sleep; up to 21 hours per day they need to conserve their energy. c. lions like to sleep up to 21 hours per day they need to conserve their energy. d. lions like to sleep up to 21 hours per day; they need to conserve their energy.