First off, what country/nation is the question based on?
I will go ahead and give you a generalized answer that could apply for any country/nation:
In the past, it was important for the military to guard is gold reserves and mines so that other "enemies" couldn't just go walk in an steal their gold from their mines or reserves. And pretty much the same applies with trade routes, and also so people couldn't go hijacking their trade routes and steal goods from the people travelling the route.
The lobbying powers of producers is the main reason behind this there being.
Producers in USA are highly organized into strong lobby unions unlike consumers who would benefit from cheap imports, thus competition. consumers are not organized to help in lobbying.
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George Washington, 1789-1797
John Adams, 1797-1801
Thomas Jefferson, 1801-1809
James Madison, 1809-1817
James Monroe, 1817-1825
John Quincy Adams, 1825-1829
Andrew Jackson, 1829-1837
Martin Van Buren, 1837-1841
William Henry Harrison, 1841
John Tyler, 1841-1845
James Knox Polk, 1845-1849
Zachary Taylor, 1849-1850
Millard Fillmore, 1850-1853
Franklin Pierce, 1853-1857
James Buchanan, 1857-1861
Abraham Lincoln, 1861-1865
Andrew Johnson, 1865-1869
Ulysses S. Grant, 1869-1877
Rutherford Birchard Hayes, 1877-1881
James Abram Garfield, 1881
Chester Alan Arthur, 1881-1885
Grover Cleveland, 1885-1889
Benjamin Harrison, 1889-1893
Grover Cleveland, 1893-1897
William McKinley, 1897-1901
Theodore Roosevelt, 1901-1909
William Howard Taft, 1909-1913
Woodrow Wilson, 1913-1921
Warren Gamaliel Harding, 1921-1923
Calvin Coolidge, 1923-1929
Herbert Clark Hoover, 1929-1933
Franklin Delano Roosevelt, 1933-1945
Harry S. Truman, 1945-1953
Dwight David Eisenhower, 1953-1961
John Fitzgerald Kennedy, 1961-1963
Lyndon Baines Johnson, 1963-1969
Richard Milhous Nixon, 1969-1974
Gerald Rudolph Ford, 1974-1977
James Earl Carter, Jr., 1977-1981
Ronald Wilson Reagan, 1981-1989
George Herbert Walker Bush, 1989-1993
William Jefferson Clinton, 1993-2001
George Walker Bush, 2001-2009
Barack Hussein Obama, 2009-2016
Trump, 2017
Answer:
d. He refused to enforce it.
Explanation:
President Andrew Jackson's reaction to the ruling was he refused to enforce it.