Final answer:
The correct form is 'recibió'.
Step-by-step explanation:
The correct form of the preterite to complete the sentence 'Mi hermana __ una invitación a una fiesta grande.' is recibió (choice C).
In Spanish, the preterite tense is used to talk about completed actions in the past. The verb 'recibir' means 'to receive', and in the third person singular form, it becomes 'recibió'.
For example, 'Mi hermana recibió una invitación a una fiesta grande' means 'My sister received an invitation to a big party'.
Learn more about Spanish verb conjugation