Though Khyber Pass is free of landslides, there is so much difficulty

Question

Though Khyber Pass is free of landslides,  there is so much difficulty in navigation that is considered a serious hazard in safety  by most mountaineers.
 
A. there is so much difficulty in navigation that is considered a serious hazard in safety 
B. it is so difficult to navigate that it is considered a serious safety hazard
C. so difficult is it to navigate as to be considered a serious safety hazard
D. such is its difficulty to navigate, it is considered a serious safety hazard
E. it is of such difficulty to navigate that is seriously considered a safety hazard

albertziade · Answer

Can someone explain why the answer is B?

How would you explain the usages of it and it with precision? (their specific roles)

Thanks

SonalSinha803 · Answer

Though Khyber Pass is free of landslides, there is so much difficulty in navigation that is considered a serious hazard in safety by most mountaineers.

A. "there" is "so much difficulty" in navigation "that is" considered a serious hazard in safety

B. it is so difficult to navigate that it is considered a serious safety hazard

C. "so difficult" "is it" to navigate "as to be" considered a serious safety hazard

D. "such is its difficulty to navigate", it is considered a serious safety hazard

E. "it is of such difficulty" to navigate "that is" seriously considered a safety hazard

I have marked the errors in each option in inverted commas.

I would go for option B.

Sent from my Lenovo K53a48 using  GMAT Club Forum mobile app

albertziade · Answer

Appreciate your input.

But still, my goal was to understand why the inverted commas are wrong. ex: "such is its difficulty to" navigate. 
Indeed, it is but is there a specific grammatical reason?

Thanks,
Albert

Abhishek009 · Answer

So X that Y is correct idiomatic usage, none but (B) is correct, hence correct answer Must be (B)

Though Khyber Pass is free of landslides, there is so much difficulty

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

GMAT Sentence Correction (SC - EA only) Questions

Though Khyber Pass is free of landslides, there is so much difficulty

Prep Toolkit

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards