The answer is A i got it right in my class as of right now hope this helps.
I feel like b isn’t grammatically correct, so I’ll go with a.
They have both have stripes, are animals, both mammals, they both walk on all fours and they both can be highly dangerous
Norgay started the narration about
the climb from himself but then narration is shifted to Hillary’s climb and
focus is on the events of Hillary’s incomplete account. Later he resumed the
narration of the adventure providing pauses and bringing in Hillary time and
again. It seems like the point is being made that the climb would not have been
possible with anyone’s single efforts rather it was a joint effort regardless
of whose step was the first step.