Why does Mathilde borrow the necklace from Madame Forestier?

Question 3 options:

All women must wear a necklace to the party.

Mathilde believes she owes it to her because Madame Forestier borrows things from Mathilde all the time.

Mathilde thinks she must have an expensive necklace so she looks fashionable and important at the party.

The necklace is really hers, and she is trying to get it back.

Mathilde thinks she must have an expensive necklace so she looks fashionable and important at the party.