Select the option that arranges sentences B, C, D and E in a logical sequence. Sentences A and F are static.
A. Mountaineering is still a precarious task despite the protective equipment and oxygen masks available to the climbers.
B. Another important factor for the success of a climber is his presence of mind which can keep death at bay.
C. It is this alertness which safeguards the climber and his expedition.
D. The success of the mountaineer is ultimately determined by his stamina and will power. E. These, of course, are indispensable accessories of climbing but what is more important is the climber's stamina. F. One false step can strike a fatal blow to the climber and bring disaster to the expedition.