The way to discard option in this exercise could be like this:
First fue is the past conjugation of the verb ir which is an irregular verb.
Secondly the verbs tomó and leyó are both reglar verbs but conjugated in simple past perfect so they are not suitable.
And finally the last option would be hablaba which is the conjugation of the regular verb hablar in the past imperfect. Here is the complete conjugation of this verb:
