No, it would be reasonable to pick the ONE charge you thought most fitting.Here's the breakdown of why Chauvin was convicted on ALL 3 charges:
What's second-degree unintentional murder?
It's also called felony murder. To prove this count, prosecutors had to show that Chauvin killed Floyd while committing or trying to commit a felony - in this case, third-degree assault. They didn't have to prove Chauvin intended to kill Floyd, only that he intended to apply unlawful force that caused bodily harm.
What about third-degree murder?
For this count, jurors had to find Chauvin caused Floyd's death through an action that was "eminently dangerous" and carried out with a reckless disregard for and conscious indifference to the loss of life.
And second-degree manslaughter?
Prosecutors had to show that Chauvin caused Floyd's death through culpable negligence that created an unreasonable risk, and that he consciously took the chance of causing severe injury or death.
All three seem reasonable