Answer:
D - Sherpas
Explanation:
" ...In the high peaks of the Himalayas, Sherpas (members of the Nepalese ethnic group) are famous for their speed-climbing records, ascents of routes that no one has ascended before, expert guiding and other skills."
This means that they help the people who want to climb Mount Everest because they have so much experience living there for so long.
