Select the option that contains a grammatical error in the underlined portion.

It would be impossible for them to continue living in this world if each of them knew exactly what fate had it store for them.

It would be impossible for them to continue living in this world if each of them knew exactly what fate had it store for them.

It would be impossible for them to continue living in this world if each of them knew exactly what fate had it store for them.

It would be impossible for them to continue living in this world if each of them knew exactly what fate had it store for them.

It would be impossible for them to continue living in this world if each of them knew exactly what fate had it store for them.