Cathy owes six overdue movies to her local video store. Since each of Cathy’s overdue videos is a comedy, only comedies are currently overdue at Cathy’s local video store.

Which one of the following premises, if added to the statements above, would allow the conclusion to be valid? (Points : 1)
Cathy’s local video store is the only video store she rents videos from.
Cathy’s local video store rents other kinds of movies besides comedies.
Cathy is the only person who owes overdue videos to her local video store.
Cathy does not owe overdue movies to any video store besides her local video store.

The premise that, if added to the statements, would allow the conclusion to be valid is: "Cathy does not owe overdue movies to any video store besides her local video store."

To understand why this premise is necessary, let's analyze the given statements. We know that Cathy owes six overdue movies, and since each of these overdue videos is a comedy, it implies that only comedies are currently overdue at Cathy's local video store.

Now, we need to determine whether Cathy owes overdue movies to any other video store besides her local video store. If she does owe overdue movies to another video store, then it is possible that the other videos are not comedies, which would negate the conclusion that only comedies are currently overdue at Cathy's local video store.

Therefore, in order for the conclusion to be valid, we must add the premise that Cathy does not owe overdue movies to any video store besides her local video store. This ensures that the only overdue movies she has are comedies, and thus, only comedies are currently overdue at her local video store.

The premise that, when added to the statements above, would allow the conclusion to be valid is:

"Cathy’s local video store rents other kinds of movies besides comedies."