A train traveling very fast (v = 0.6c) has an engineer (E) at the front, a guard (G) at the rear, and an observer (SI ) exactly half way between them. Both E and G are equipped with yellow signaling lamps. The train passes a station, closely observed by the station master (S). Both E and G use their lamps to send signals. According to both S and SI these signals arrive simultaneously at the instant SI is passing S. According to SI :
A. E and G sent their signals simultaneously from different distances
B. G sent his signal before E and from farther away
C. G sent his signal before E but was the same distance away
D. E sent his signal before G and from farther away
E. none of the above
