Meaning of "stuck out a mile"

[Zishuli]

English Language Tests, Intermediate level

ESL/EFL Test #242 "A Sticky Moment", question 8

But it soon became clear to everyone that he had trained in this type of work as it stuck ......... a mile.

(a) out
(b) into
(c) beneath
(d) above

English Language Tests, Intermediate level

ESL/EFL Test #242 "A Sticky Moment", answer 8

But it soon became clear to everyone that he had trained in this type of work as it stuck out a mile.

Correct answer: (a) out
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Hi,
I am not quite clear that what the meaning of " stuck out a mile" is. Can anyone help me？

[Alan]

Hi,

If something 'sticks out a mile' it means that it is obvious/clear to everyone.

Alan
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English as a Second Language
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