According to the Authors, the Delegates at the Philadelphia Convention

According to the authors, the delegates at the Philadelphia Convention were united by which of the following concerns?

A) Foreign trade had suffered as a consequence of poor relations with other countries.
B) The economic radicalism of Shays's Rebellion might spread in the absence of a stronger central government.
C) The national government had been ill-equipped to provide citizens with protection from Native Americans.
D) The national government was powerless to address the postwar economic depression.
E) All of these choices are correct.