Final answer:
The correct verb form to complete the sentence is 'leía'. It matches the subject 'Ella' and the ongoing action implied.
Step-by-step explanation:
The correct verb form to complete the sentence is leía. 'Leía' is the imperfect tense form of the verb 'leer', which means 'to read' in Spanish. In this context, the sentence suggests that 'she' used to read the newspaper every morning while having breakfast. The imperfect tense is used to describe ongoing or repeated actions in the past. The verb forms 'lee', 'leían', and 'leyó' do not match the subject 'Ella' (she) and the ongoing action implied.
Learn more about verb forms in Spanish