'In order to post' vs 'In order to prevent'

[Leonidi]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #80 "GMAT Words", question 5

In ......... to prevent any industrial espionage all employees had to sign a document preventing them from talking about their work.

(a) order
(b) command
(c) requirement
(d) purpose

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #80 "GMAT Words", answer 5

In order to prevent any industrial espionage all employees had to sign a document preventing them from talking about their work.

Correct answer: (a) order
_________________________

In order to post the message, I commented on it.

Leonidi