Can anybody explain how I solve this exercise?

Record yourself giving a performance of as much of each of the "five mini-dialogues" as you can in spanish. review the conversations for a few minutes if you need, and when you are ready, just click on the record button. you can review your performance by clicking replay.

Hola, mario: yo (1) (estar) en la universidad. la clase de anatomía (2) (ser) de cinco a siete. mi hermano y su esposa (3) (venir) a cenar esta noche. a las siete (yo) (4) (blank) (correr) al supermercado (grocery store). tú (5) (blank) (tener) que regresar a casa antes de las siete. hasta pronto. gracias, valeria

Which verb form correctly completes this sentence? me gusta leer el género narrativo, por eso prefiero que los libros novelas policiales. a. seas b. sean c. seamos d. sea