Tariff it is used to restrict trade and promote use of products within the country.
Answer:
it would be sentance 3 or you can call it 3 hope it helped :)
Because they want to keep their european Rivals Away from Valuable town and Mines in Mexico.
North America was really Loaded with Gold and Silver, and has Accounted for more than 20 % of Spains Budget back then. That's why they want to assert control over it