Final answer:
Bull's description reveals that the nature of the rebellion is disorganized and lacks a clear purpose.
Step-by-step explanation:
Bull's description of Shays's Rebellion reveals that the nature of the rebellion is A) disorganized and lacks a clear purpose. Despite the rebels numbering only 1,200, many leaders believed that anarchy was imminent. This suggests that the rebellion lacked organization and a clear goal. Additionally, James Madison's conclusion that the rebellion had been instigated by the British indicates a lack of strategic planning on the part of the rebels.