Question 1 unsaved how did thomas jefferson’s louisiana purchase benefit the united states? question 1 options: it created a barrier between the states and the indian tribes to the west. it generated income that freed the nation of significant debt incurred during the war of 1812 it doubled the size of the country and guaranteed u. s. control of the mississippi river. it prevented the spanish from capturing that part of the united states and taking over the mississippi river.

 It doubled the size of the country and guaranteed US control of the Mississippi River.

Explanation:  President Thomas Jefferson and those favoring the Louisiana Purchase justified it as an act done for the good of the country. Initially, President Jefferson had commissioned James Monroe and Robert Livingston to negotiate a deal with France to acquire New Orleans or all or part of Florida, as a means of avoiding the potential of an armed conflict in such areas.  Monroe and Livingston were authorized to spend up to $10 million.  What they found out was that Napoleon was already set to sell a much wider range of territory to the United States, to finance his European wars.  Napoleon was asking $22 million for the whole territory that became the Louisiana Purchase.  The US team negotiated the price down to $15 million.  But then there was a constitutional crisis back home.  Did the President have the authority under the constitution to make such a major addition to the nation's territory and spend the nation's funds to do so?  Jefferson himself considered pursuing a constitutional amendment, but his Cabinet members disagreed and the measure was sent to Congress for approval.  In a statement he made at the time, Jefferson justified the purchase with this analogy:  "“It is the case of a guardian, investing the money of his ward in purchasing an important adjacent territory; and saying to him when of age, I did this for your good." 

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.