Nerve racking vs. Nerve splitting

[rich7]

Test No. incompl/advan-36 "Super Supermarkets", question 6

Big discussions take place in the area as to whether a supermarket will come to the area and waiting for the outcome can be quite ......... for the small shop owner.

(a) nerve killing
(b) nerve hurting
(c) nerve racking
(d) nerve splitting

Test No. incompl/advan-36 "Super Supermarkets", answer 6

Big discussions take place in the area as to whether a supermarket will come to the area and waiting for the outcome can be quite nerve splitting for the small shop owner.

Correct answer: (d) nerve splitting

Your answer was: incorrect
Big discussions take place in the area as to whether a supermarket will come to the area and waiting for the outcome can be quite nerve racking for the small shop owner.
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couldn't "nerve racking fit here?

mind this: http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861696785

[Alan]

Yes you're right. This should be nerveracking and the error is going to be put right.

Thanks for your help.
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English as a Second Language
You can read my ESL story Word Story: Search Engines

[rich7]

That's good, it leaves me with a feeling of accomplishment, and it's the reflextion of the learning process that I've been undergoing. So if you all, new learners and regular users can check all my post and even further my first one, back in november, you will notice my improvement of the use of the English language. All this due to this very forum, in this sense I highly recommend it.

Keep it up y'all
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I should have been born in the USA.
I've got this thing about America.

[doanngockhanh]

Dear Sir,
Could you explain the meaning of:
- nerve killing
- nerve hurting
- nerve racking
- nerve splitting
Why we use "nerve racking" here?
I couldn't find them in the dictionary.
Thank you very much and Best regards

[doanngockhanh]

Hi,
I think I've got it. It's the same meaning as the expression: to rack one's brain: to think hard about a problem. Is it right?
Thank you so much