How do I know if my answer is correct or not?

[Buka]

Business English Lesson, Advanced Level

ESL/EFL Test #198 "Trade Multilateralism", question 3

Global rules ......... global production.

(a) all
(b) ease
(c) stress
(d) through

Business English Lesson, Advanced Level

ESL/EFL Test #198 "Trade Multilateralism", answer 3

Global rules ease global production.

Correct answer: (b) ease
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how do i know if my answer is correct or not?

Buka

[Beeesneees]

Look at what you have copied and pasted above. The last two lines tell you the correct answer.
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Cheers m' dears!