The Louisiana Purchase helped to double the size of the country and provided control of the Mississippi River. The Louisiana Purchase was a massive land purchase by the U.S. from France under President Thomas Jefferson's administration.
<span>The correct answer is B. The political party "approves" and assumes a "watchdog" function over its candidates indeed (like answer B says), but all the other 3 choices are quite extreme and manipulative methods, to adapt in case of grave transgression or records' blemishes. </span>
