Answer: C. me acuerdo
Yo no me acuerdo de lo que pasó anteayer.
Translation: I don't remember what happened the day before yesterday.
Step-by-step explanation:
The reflexive verb "acordarse" is conjugated using the reflexive pronoun corresponding to the subject of the sentence. The subject is "Yo", the first person singular, so we have to use the reflexive singular first person pronoun "me". Since it is in the present tense: "me acuerdo".
Spymore