Best option: 3 (more time to think of ideas)
2:
1(more deaths)
5(Papyrus attacks them for good reason)
Worst option: 4(Papyrus attacks them anyways)

Chara's POV
I tear up the choice isn't mine. I couldn't choose. Now I need to do this. For everyone. I glance at my save file as I start to try to touch the RESET button. It quickly becomes corrupted. I panic. I can't touch that or I'll be taken over! Death. Maybe a death will work.
I walk over to Sans again. He must've noticed my peacefulness. He doesn't attack. "Kiddo. I sense a change of heart. I'll act like Blue again if you want...." Sans tells me.

"Kill me Sans.... maybe then I can do a Pacifist Route."
"I can't..."
"What!"
"...I can't give you Karma right now. And I'm tired. I'm tired of a lot of things so please reset."

There's only one way he'll attack me. If I attack him. I pick up my knife and attack him. He dodge. "Really determined for everything huh?" I glare at him only to feel that I'm not in control. "Yeah comedian. Miss me?" "You're not this world's Chara you're..." "Genocide Chara. Your Chara. Frisk taught me how to kill. Of course you couldn't do anything about that huh? And now look. It's just me and you again. I tear up and Sans must've noticed again....

"Chara. Fight this Chara off. Please...." Sans seems to yell.

Papyrus' pov
I wake up next to where Sans was. He's not here! I panic and teleports to Snowdin. Nope. Muffets. Definitely not. It's empty.... The house. Nope.... where could he be? Waterfall with Alphys? Not there either.... where can he be? I remember! The cameras got footage. I hope he's not dead....or in the fallen ruins....

I teleport to Undyne's lab. I quickly race towards the monitor and look towards the footage. I can't see Blue at att in any of these. Just a bunch of staticky cameras. Blue's not there unless.... he's not Blue but the Sans again...