Which word defines “deplorable” best? peaceful uneventful beautiful regretful

The best one out of the four listed would be: Regretful.

Explanation:

That word is the most accurate out of the words listed due to the fact that "deplorable" means to do something deserving of condemnation.

Explanation: In context of taking another humans' life, that is something considered deplorable by the U.S. legal system. It might be something that would be considered worthy of regret. It's a bit of a stretch but neither of the other answers would make sense.

D - regretful

Explanation:

Of these choices, regretful is the closest in meaning. If something is 'deplorable' it is REALLY bad - like homeless people live in deplorable conditions or the treatment of the Jews was deplorable during the Holocaust.

this is incorrect

explanation:

this is false