What does the word 'restrain' mean?

[Magomed]

Test No. incompl/advan-37 "A Public Figure", question 4

There was very strong support for the police who were determined to ......... this kind of crime.

(a) restrain
(b) manage
(c) curb
(d) kill

Test No. incompl/advan-37 "A Public Figure", answer 4

There was very strong support for the police who were determined to curb this kind of crime.

Correct answer: (c) curb

Your answer was: incorrect
There was very strong support for the police who were determined to restrain this kind of crime.
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Why word restriane isn't fit here?

[Torsten]

Hi Magomed,

You are trying to ask so many questions at once that you barely have enough time to think and write your question correctly: :)