The correct answer to this open question is the following.
Although no options are attached, we could say that the best primary source material about the works of Mohandas Gandhi should be their own writings. That is the characteristic of a primary source, the information was written by the character itself of people that directly witnessed the life or events. For instance, there is a book authored by Ronald Duncan, that collects a series of documents written by Gandhi. The name of the book is "Selected Writings of Mahatma Gandhi."
President Truman did not make the right choice regarding the atomic bomb droppings on Hiroshima and Nagasaki. ... Truman had the right to use the bombs but only after he gave the Japanese a chance at surrender and even then he should have only used one in the most extreme case.
One of the reasons why some leaders believed that unicameral legislatures created more democratic governments was because bicameral ones often led to gridlock and political hardship. Hope it helps