Based on the information in the chart, the response that best explains why Congress might have been divided about declaring war on Britain is:
Some representatives were not convinced that the rumors about the Native American attacks were true.
This response implies skepticism regarding one of the key causes for the war, which could lead to divided opinions among Congress members. Other options focus on military readiness or regional concerns but do not directly address the division in Congress regarding the belief in the validity of the war's causes.