Which of the following is a statement of opinion? A.Before starting construction on the Hyperloop system, Elon Musk would need to obtain environmental clearances. B.James E. Moore II is the director of the transportation engineering program at the University of Southern California. C.The challenges to building the Hyperloop are substantial, but the system will likely be built eventually. D.An inventor has given permission for other engineers to tinker with his design of the Hyperloop