The answer is B purely due to this statement:
"secures the blessings of liberty" which is in the preamble. Also because it is defined as a natural right. Hope this helps and let me know if you need more help!
D, because the answer is in the question : "a statistic is given that says how many boxcars could be filled with the garbage is dumped into earth's water..."
B.
is the right answer because it said about Elbridge Gerry of Massachusetts redraw the congressional districts in his state to give his party unfair political advantage.
John hay negotiate to establish open door policy with: China and the countries with spheres of influence.
At that time, john hay believe that establishing open door policy with these countries would bring economic wealth to united states. Under this policy, United states would be able to trade with china and those other countries without many restrictions such as tariff or quota. This would bring more profit to american producers.
They allowed for travel against a rivers current Hope this helps! ;D