The very beginning sentence of an IELTS essay, said to have achieved the full band score, reads:
- Perhaps no subject in the world is as likely to cause so much controversy as advertising does.
I thought it would be better to say either:
- Perhaps no subject in the world is as likely to cause so much controversy as advertising is. [rather than does]
or
- Perhaps no subject in the world is likely to cause as much controversy as advertising does.
To clarify, I'd like to know if the first sentence is alright the way it is, or needs some emendation; Plus, I'd like to learn if the second and the third changes are acceptable, or why, if not. Thanks.