Read the excerpt below: "When you picture mountain climbers scaling Mount Everest, what probably comes to
mind are teams of climbers with Sherpa guides leading them to the summit, equipped with oxygen masks,
supplies and tents. And in most cases you'd be right, as 97 per cent of climbers use oxygen to ascend to
Everest's summit at 8,850 metres above sea level. The thin air at high altitudes makes most people breathless
at 3,500 metres, and the vast majority of climbers use oxygen past 7,000 metres. A typical climbing group will
have 8-15 people in it, with an almost equal number of guides, and they'll spend weeks to get to the top after
reaching Base Camp. But ultra-distance and mountain runner Kilian Jornet Burgada ascended the mountain in
May 2017 alone, without an oxygen mask or fixed ropes for climbing. Oh, and he did it in 26 hours. With food
poisoning. And then, five days later, he did it again, this time in only 17 hours." Retrieved from:
https://learnenglish.britishcouncil.org/skills/reading/c1-reading/a-biography-of-kilian-jornet. Simply put, a
subject is an entity to which a statement refers. The subject in the sentence "The thin air at high altitudes
makes most people breathless at 3,500 metres" is:
A the thin air.
B the thin air at high altitudes.
C makes.
D most people.
E most people breathless at 3,500 metres.
