The Question,"How Did the American People Rate the Performance of George

The question,"How did the American people rate the performance of George W.Bush immediately after the war in Afghanistan?" would be addressed using a ________.However,a ________ would be used to address the question,"How did the American people change their view of Bush's performance during the war in Afghanistan?"

A) cross-sectional design;longitudinal design
B) longitudinal design;multiple cross-sectional
C) longitudinal;cross-sectional design
D) none of the above