Question

from maus by art spiegelman
my daughter! how can she manage alone - with four children to take care of?
and, what do you think? he snerked on to the bad side!
those with a stamp were let to go home. but there were very few jews now left in sosnowiec...
and those on the bad side never came anymore home.
well... its enough for today. yes, artie?..
one from three they kept at the stadium.... maybe 10,000 people - and with them, my father.
art spiegelman
what happened to the people sent to the left at the stadium?
○ they were sent out of poland.
○ they were sent to concentration camps.
○ they were able to move out of the ghetto.
from the complete maus by art spiegelman. maus, volume i. copyright ©1973,1980,1981,1982,1983,1984,1985,1986 by art spiegelman. used electronically by per wylia agency llc
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Explanation:

The comic panels note that people sent to the "bad side" (implied to be the left at the stadium) "never came anymore home," and context from Maus (a graphic novel about the Holocaust) confirms those sent to this side were deported to concentration camps, where they were systematically killed or imprisoned and did not return. The other options do not align with the fatal implication of "never came home" and historical context of the Holocaust.

Answer:

They were sent to concentration camps.