What was the primary cause of the fall of the Zhou dynasty?

The primary cause for the collapse of the Zhou dynasty was the implementation of the fengjian system, where the royal family would strengthen their authority over the other states by installing relatives as lords in the regions. ... During the Eastern Zhou period, royal authority continued to unravel.

Explanation:

Googole

answer; the correct answer is (travel horizontally);

i would say b. research typically uses a variety of sources