Meaning of 'whiff'

[doanngockhanh]

Test No. incompl/advan-44 "Scandal", question 8

The Prime Minister called Mathew in to talk to him and said he couldn't tolerate any ......... of scandal in his Party.

(a) whiff
(b) scent
(c) smell
(d) stink

Test No. incompl/advan-44 "Scandal", answer 8

The Prime Minister called Mathew in to talk to him and said he couldn't tolerate any whiff of scandal in his Party.

Correct answer: (a) whiff
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Dear Sir,

Are there any differences between the above 4 words? As I look up the dictionary, they're almost the same. Please explain

Thank you very much
doanngockhanh

[Alan]

You need whiff here to mean the smallest sign.
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English as a Second Language
You can read my ESL story Adverbs