Ok i might be wrong but it might be c or d
Social psychology can be best defined as the study of interactions between individuals - C. A very formal definition would be that it studies the individual and how he behaves in groups and how these interact :)
3. A and B are your answers. Im pretty sure those are the only two.
However, the Song dynasty was difficult to conquer because of the strategic location of Xiangyang, which became a vital position for Kublai to capture and hold. The city guarded the waterways of South China because the Han River was a major tributary into the Yangtze River.
