Armin's burned down body laying on the roof. But he is still breathing. Just like Erwin, that is still alive after attack of beast titan. Both of them are barely breathing. You have one titan serum. And you can give it only to one of them. To eat Berthold so one of them could survive. But who it will be?

Eren and Mikasa are arguing with Floch. Wanting Armin to survive. While Floch was the one to get Erwin's body

Eren: Screaming outloud with desperation "Armin is the one who saved us all time! He found the way to warehouses in Trost! He is the one who found who is female titan! HE IS THE ONE WHO SAVED US ALL THE TIME! NOT COMMANDER!"

Floch: He is more calm. But still nervous "That's why I survived in this fight! Levi! It's my destiny! To save Commander's Erwin life! He is the smartest! The most important! We can sell him for a kid!"

Mikasa: She is being held by Hange. She is screaming desperately. Almost choking in tears "I know that... but Armin could help us too! He is special!"

It's time for you to decide