"double the amount of" or "twice the amount of", pollution at airport

[bluetutu]

I am really confused by the two words, and I would go for A or B since twice is an adverb and should not be used to modify "that (amount of pollutant)".



Providing initial evidence that airport are a larger source of pollution than they were once believed to be, environmentalists in Chicago report that the total amount of pollutant emitted annually by vehicles at O’Hare International Airport is twice as much as that which is being emitted annually by all motor vehicles in the Chicago metropolitan area.

• as much as that which is being emitted annually by all
• as much annually as is emitted by the
• as much compared to what is annually emitted by all
• that emitted annually by all
• that emitted annually compared to the

[cubicle]

I would go for D

A) as much ____ as is not correct use

B) is is wrong

C) Wordy

D) Correct.that refers to amount of pollutant 'emitted'

E) amount is compared to motor vehicles.

what is Official Answer?

[sh_vivek]

Imo C

[manasdas]

would option B be correct if it is rephrased as-
as much as is emitted anually by all

if yes, then it that case which would be better-
B or D?
"as much as is emitted anually by all" OR "that emitted annually by all"
please let me know. thx

[lesfeaves]

D here

[bose]

imo D

[rajkoneru_23]

Imo D

[shweta26]

The correct answer would be D

[rrgmat]

IMO D, Official Answer pls?

[jay_m]

Imo D.