What is the answer.
A. The elevation of sea level is 0 km and the elevation of the summit is 5 km.
B. The elevation of sea level is 5 km and the elevation of the summit is 5 km.
C. The elevation of sea level is 0 km and the elevation of the summit is 10 km.
D. The elevation of sea level is 5 km and the elevation of the summit is 10 km.