2014 multiple choice question (1 Viewer)

[Untroubled]

I came across question 20 of the 2014 multiple choice economics paper and was quite confused on how to solve it, anyone can help?
Answer is C according to Board of Studies.
I can't quite be bothered to post a screen shot of the question xD.

 

[lpodtouch]

By introducing a $5 tariff on top of the world price, this means that only 40million imports enter the country (70-30m). Therefore, a quota of 40m imports will have the same effect. (C)

 

[Untroubled]

By introducing a $5 tariff on top of the world price, this means that only 40million imports enter the country (70-30m). Therefore, a quota of 40m imports will have the same effect. (C)

Lol. Can't believe I didn't think of it this way, thank you