Iknew i could never let mom hear the messages, because protecting her is one of my most important raisons d’être, so what i did was i took dad’s emergency money from on top of his dresser, and i went to the radio shack on amsterdam.
what assumption does the narrator make in this excerpt?
a. that his mother would not understand the messages
b. that the messages would increase his mother’s suffering
c. that his father’s emergency money should be replaced
d. that the employees at radio shack would sympathize with him

The assumption that the narrator make in the excerpt is: B. that the messages would increase his mother’s suffering

A statement would be considered as assumption if it based on personal's train of thought without accompanied by facts.

From this line:

I knew I could never let Mom hear the messages, because protecting her is one of my most important . . .

We can infer that the speaker believe that hearing the message would somehow cause some sort of damage to the mother, which is why the narrator choose to not give the message.

answer: i think it might be the last one

explanation:

he is a vloger now and he could't be vlogging everyday when he had to do the casting for minato.