All a question of order

[rahul]

Test No. incompl/inter-74 "Christmas Postman (1)", question 6

It was all a question of ........., he said and then he explained

(a) ruling
(b) straightening
(c) tidying
(d) order

Test No. incompl/inter-74 "Christmas Postman (1)", answer 6

It was all a question of order, he said and then he explained

Correct answer: (d) order

Your answer was: incorrect
It was all a question of straightening, he said and then he explained
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please give me explanation for this sentances

[Alan]

This means the most important thing is order - things in their right place.
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English as a Second Language
You can read my ESL story Present Simple