Difference between matter and business

[Guest]

Test No. incompl/inter-81 "Save Our Animals (1)", question 9

They lived in a des res (very attractive house) and her father, John Fortune, who was really a bit of a fat cat (wealthy businessman) thought that all this animal ......... was a lot of hocus pocus (nonsense).

(a) matter
(b) business
(c) concerns
(d) topic

Test No. incompl/inter-81 "Save Our Animals (1)", answer 9

They lived in a des res (very attractive house) and her father, John Fortune, who was really a bit of a fat cat (wealthy businessman) thought that all this animal business was a lot of hocus pocus (nonsense).

Correct answer: (b) business

Your answer was: correct
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I was not sure because of "business". So why wouldn't have "matter" been suitable?

[Torsten]

Matter is more specific than business. If you talk about a particular issue or problem, you can use the word matter. Animal business covers a wider range of things that are related to one topic.
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Test Of English for International Communication
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[rich7]

Manner or matter?
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I should have been born in the USA.
I've got this thing about America.