Need help with tariff question (1 Viewer)

[Bongo]

I'm having troubles answering this tariff question. The answer is D. Any help will be greatly appreciated

 

[KingTings]

Revenue of foreign producers = revenue x price.
Since the tariff is making the price move from $10 to $15, demand is lost.
The value of this lost demand is shown by the difference in revenue --> (200 x 15) - (100 x 10)
= 2000