Saldré is the right answer
Ella es mi madre
Estos libros son tuyos
Es nuestro pero
Este libro
Hey!
While both are often used, the most accurate answer is probably answer a:
The "personal a" is necessary.
Why?
Well, when we say: "Quiero a mi esposo Jorge" we are talking specifically about the husband, that is: "lo quiero a él". Therefore, the "a" is usually used on these occasions.
