The correct answer to this open question is the following.
Although there is no source document attached or any other reference, we can say that Henry Wallace’s background and previous disagreements with President Truman might have biased his thoughts because Wallace had a different political perspective as the former Presidential Candidate of the Progressive Party. His own point of view and political tendencies made Wallace bias his opinions and criticized the way President Truman acted during the Cold War years. Wallace had been Truman's Secretary of Commerce but never get along well with Truman. Wallace's liberal approach biased their opinions about Truman's decision to change the New Deal legislation and the foreign policy to contain Communism.
The best statement regarding the US Supreme Court would be "<span>d. The Supreme Court first claimed the power of judicial review under the leadership of John Marshall," since this was the outcome of the case "Maubery vs. Madison". </span>
Wagon trains were caravans of covered wagons each wagon pulled by horses. This is the type of caravan that saw used traveling the orogen trail and by other settlers moving west across the united states. Played the computer game "Oregon Trail" to get a realistic idea of what life on a Wagon Train may have been like...."Oops you died of starvation."