I think it’s either A or D
<span>The Monroe
Doctrine, in defending the rights of the emancipated and free colonies
of the entire American continent, was showing a position of support and
of "elder brother" of the rest of the new countries of America. In
defending the independent colonies, in front of the European and
colonial powers, the doctrine gave citizens a sense of the country's
strength, of great stability and of having sufficient capacity to face
the empires of Europe. <span>In addition to feeling a
confidence and security that his country, not only protected the
Americans, but helped the new nations that emerged, giving an optimistic
and encouraging to citizens.</span></span>
1.The stock market crash of 1929
2. Bank Failures
3. Reduction of purchasing across the board.
