Your answer that fills in the blank is: Social Security.
Answer: D) Native Americans were forced to relocate to new territories.
Explanation: As a result of the westward expansion of the United States Native Americans were forced to relocate to new territories. America's expansion westward did not have any significant impact on immigration, agriculture, or industry.
(I JUST TOOK THE TEST TRUST ME LOL)
It is defiantly not stocks, and not bonds because those are investing in something that can flip on you and make you lose your money... so i think it would be bank accounts