Answer: Anoche
Explanation: The sentence is:
Me acosté temprano ______________________ y me levanté temprano hoy por la mañana.
And a rough translation of this is:
"______ I went to bed early, and wake uo early this morning"
The options are:
La semana pasada (Last week )
Hace dos meses (Two months ago )
Anoche (Last night )
Based in the context of the sentence, the one that makes sense is Anoche (last night)
Me acosté temprano ___Anoche__ y me levanté temprano hoy por la mañana.