What decision did Kara make?
That was revealed on Supergirl Season 3 Episode 21 when the hero realized that a change was coming and she had to be on the good end of it.
Meanwhile, J'onn learned that a special DEO-caliber gun was making the rounds on the streets of National City.
This put him at odds with other members of the team who had differing opinions about how to deal with it.
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