Direction: Given below are four jumbled sentences. Select the option that gives their correct order.
A. The mountaineers set up a camp at a height of 15000 feet.
B. Then they started climbing.
C. They struggled up a steep slope and stopped at a height of 20000 feet
D. There they stayed for a week to get accustomed to the climate.
(a) $\mathrm{ABDC}$
(b) CADB
(c) $\mathrm{ADBC}$
(d) CDAB