Black Manta's Retaliation

The spoiler for Black Manta: Deep Sea Deviant says:
"Retaliation - If one of your Villains is KO'd, deal 1 damage to your opponent for each of your active Villains."
Can you please clarify a few scenarios?
A) I have 1 Black Manta die, 2 Harley Quinn dice, and 1 Joker die fielded. If the Joker die is knocked out, does Retaliation deal 2 damage (1 for Black Manta, 1 for Harley Quinn) or 3 damage (1 for each remaining die)?
B) I have 1 Black Manta die and 1 Harley Quinn die fielded. If the Black Manta die is knocked out, does Retaliation deal 1 damage (for Harley Quinn) or no damage (because Black Manta is no longer active)?
C) Related to scenario B, I have 1 Black Manta die and 1 Harley Quinn die fielded. If they are both knocked out via combat damage (which resolves simultaneously), can the active player choose to knock out Harley Quinn first and trigger Retaliation?
"Retaliation - If one of your Villains is KO'd, deal 1 damage to your opponent for each of your active Villains."
Can you please clarify a few scenarios?
A) I have 1 Black Manta die, 2 Harley Quinn dice, and 1 Joker die fielded. If the Joker die is knocked out, does Retaliation deal 2 damage (1 for Black Manta, 1 for Harley Quinn) or 3 damage (1 for each remaining die)?
B) I have 1 Black Manta die and 1 Harley Quinn die fielded. If the Black Manta die is knocked out, does Retaliation deal 1 damage (for Harley Quinn) or no damage (because Black Manta is no longer active)?
C) Related to scenario B, I have 1 Black Manta die and 1 Harley Quinn die fielded. If they are both knocked out via combat damage (which resolves simultaneously), can the active player choose to knock out Harley Quinn first and trigger Retaliation?