Question

Climbing Mt. Kilimanjaro is an______________ that only the bravest—or most foolish—mountain trekkers dream of undertaking. Every year, several people die while hiking; many more suffer permanent injuries. A. OBSESSION B. ORDEAL C. PERSISTENCE D. FLUENCY

Answer 1

Ordeal this is because ordeal would mean that this is something of importance and should not be taken lightly. 

Answer 2

probably B. ordeal , it makes the most sense for that question