Question

conservative republicans wanted to use tariffs to protect american industry from
interstate competition.
foreign competition.
immigrant laborers.
unskilled laborers.

Explanation:

Tariffs are taxes on imported goods. The purpose of using tariffs to protect domestic industry is to make foreign - produced goods more expensive, thereby reducing competition from foreign - made products. Interstate competition is within the country, and tariffs don't target laborers (immigrant or unskilled) for industry protection in this context. So Conservative Republicans wanted to use tariffs to protect American industry from foreign competition.

Answer:

B. foreign competition.