Problem: How does the sentence end?

Mary sent a beautiful wedding invitation to Jessica because 
OPTIONS:
- Mary was having a large wedding.
- Jessica was having a large wedding.
Answer: Mary was having a large wedding.

Problem: How does the sentence end?

Ian asked Joseph when the wedding was taking place but 
OPTIONS:
- Ian forgot the date of the event.
- Joseph forgot the date of the event.
Answer: Joseph forgot the date of the event.

Problem: How does the sentence end?

There was no money in the safe, and plenty in the lock box, because the 
OPTIONS:
- safe had been secured.
- lock box had been secured.
Answer: lock box had been secured.

Problem: How does the sentence end?

The librarian tried to put the box into the library but the 
OPTIONS:
- library was too large.
- box was too large.
Answer:
box was too large.