After the War of 1812, which set of proposals called for protective tariffs and infrastructure improvements? the Truman Doctrine
The Monroe Doctrine
The Factory System
The American System

The American System i think

Explanation:

an Economic program advance by henry clay ,, that included supports for a national bank, high tariffs, and internal improvements; emphasized strong role for federal government in the economy.

This protective tariff helped American industry by raising the prices of British manufactured goods, which were often cheaper and of higher quality than those produced in the U.S.

Explanation:

the answer to this question is the third option. hope this

35 is your answer because i looked it up