Why Does the Study Conducted by Eron and Colleagues Fall

Why does the study conducted by Eron and colleagues fall short of demonstrating that watching violent TV causes violent interpersonal behavior?

A) A shortage of research funding meant that the study had to be halted before it was completed
B) The studies had serious methodological flaws that render the results uninterpretable, especially with respect to drawing conclusions about cause and effect
C) Innate violent tendencies may have motivated children to watch violent TV programs, and this same tendency may also explain violent interpersonal behavior
D) The children had extremely violent parents and this was responsible for children's violent interpersonal behavior rather than watching violent TV
E) It is necessary to replicate the finding before we can be confident enough to draw conclusions about causality