What were the tariff wars? A. the placing of tariffs on U. S. goods by foreign countries angry about U. S. tariffs
placed on foreign
goods

B. arguments in the U. S. Congress over the need for tariffs to protect business

C. violence erupting at customs stations when officials banned U. S. goods
D. battles of WWI fought over taxes placed on goods traded between countries Option
1

D. Battles of WWI fought over taxes placed on goods traded between countries

Explanation:

A tariff war is an economic battle between countries where they levy additional tax on each others exports. ... Historically, tariff wars are mutually destructive over the long run, though they might offer some short term benefits.

nativists tried to get rid of the immigrants as they thought they were going to ruin the u.s.  

missouri compromise of 1820 which prohibited slavery