The Answer is D you’re welcome
I pretty sure it was “the inability of congress to raise an army”
The Southern Song (Chinese: 南宋; 1127–1279) refers to the period after the Song lost control of its northern half to the Jurchen Jin dynasty in the Jin–Song Wars. ... In 1234, the Jin dynasty was conquered by the Mongols, who took control of northern China, maintaining uneasy relations with the Southern Song.
