Who attributed the determination to make peace to the prolonged bombing by the B-29s?

The correct attribution of the determination to make peace following the prolonged bombing by the B-29 bombers is linked to Japanese Prince Fumimaro Konoye. As a historical figure who served as Japan's Prime Minister during pivotal moments in World War II, he was in a unique position to perceive the devastating impacts of the B-29 raids on Japanese cities and the overall morale of the nation.

Konoye's recognition of the significant damage caused by the bombing campaigns contributed to the Japanese leadership's eventual decision to seek peace. His perspective is particularly important considering he had earlier been an advocate for peace negotiations prior to the escalation of conflict, which gives added weight to his acknowledgment of the role that sustained bombing played in altering Japan's stance during the war.

The other figures mentioned, while important in their own right, do not have the same direct connection to the implications of the B-29 bombing or the peace negotiations. General Colin Powell and Admiral Arthur Radford are more associated with military strategies and Cold War dynamics, while General Stonewall Jackson is a significant historical figure from the Civil War era, having no relation to the events of World War II or the specific context of the bombing campaigns in Japan.