Final answer:
Clarence Darrow argued that it was not the children's fault they murdered someone, which is true. The correct answer is option a).
Step-by-step explanation:
In the case mentioned, Clarence Darrow was defending children who had murdered another boy. He argued that it was not their fault that they committed the act. The statement in question is true. Darrow believed that external factors, such as their upbringing and environment, contributed to their actions, rather than placing the blame solely on the children themselves.