Which of the following would be a valid impossibility defense?

a. what the defendant plans to do to the victim is not a criminal act.
b. the bank closes before the defendant can rob it.
c. the victim does not show up at the ambush point.
d. the poison is not strong enough to kill the victim.

A. What the defendant plans to do to the victim is not a criminal act.

Explanation:

the historians cited in the article all agree with one another about the cause of the civil war. despite coming from different backgrounds and cultures, the historians agree that slavery was the root cause of the civil war. the fact that all these historiansgenerally agree with one another makes their shared viewpoints more reliable and valid, especially because the historians have different backgrounds and all work for the well-respected institutions of howard university, clemson university, and the university of colorado.

just don't strip down in public lol