Question about Einstein's/Newton's theory ?

no,actually it is because Einstein's theory can explain certain observational results that Newton's can't. for example, the perihelion precession of mercury. Besides, Einstein's theory predicts the bending of light. if light travels in the vicinity of mive object (for example the sun), light path will be deflected by that heavy object. Newton's theory doesn't predict this phenomena. and after it is indeed observed that light path bends near a heavy object, scientists start to accept Einstein's theory. option D isn't 100% correct. it is true that Einstein's theory is broader. however, Einstein's theory has more underlying umptions than Newton's.