What corrects the statement "President Thieu authorized bombing after North Vietnamese attacks"?

The rationale behind changing "Thieu" to "Nixon" is based on the historical context of the Vietnam War and the specific events surrounding the U.S. military strategy at that time. President Richard Nixon, as the U.S. president, made significant decisions regarding bombing campaigns in Vietnam, particularly in response to North Vietnamese actions.

Vietnamese President Nguyen Van Thieu was indeed a key figure in the conflict as the leader of South Vietnam; however, it was Nixon who authorized bombing operations, including notable escalations such as the bombing of Cambodia, aimed at countering North Vietnamese forces. This distinction is crucial for understanding the American military and political involvement in the war, as well as the chain of command responsible for military actions.

While the other options may suggest minor changes or imply that the statement is entirely correct, the primary focus on Nixon's decision-making authority in relation to military operations makes "Nixon" the appropriate correction.