Final answer:
Excerpt B provides the strongest evidence that the Woken's behavior changed in their artificial bodies, revealing human-like emotions and social dynamics.
Step-by-step explanation:
The best evidence to support the argument that the Woken's behavior began to change once they were in their artificial bodies is found in excerpt B: "Their bodies were tensed in human expressions of anger. Pinched brows, heavy breathing. Was it land they were fighting over? Food? No — it was attention.
Each subject was trying to get the other two to pay attention." This text indicates a clear behavioral shift towards typically human social dynamics and emotions, such as the desire for attention and the expression of anger, which were not inherently part of the Woken's original behavior. It is the mention of distinctly human emotions and motivations that makes this the strongest evidence of change.