Emily has purchased an expensive non$-$returnable ticket for a weekend outdoor music festival. A few days before the event, she falls ill with a mild but uncomfortable cold. She's no longer looking forward to the festival but feels compelled to attend because of the money spent on the ticket. Assuming that Emily is rational, she will:

Attend the festival since the ticket was expensive and already paid for.

Attend the festival unless she can sell the ticket for the price she paid.

Go to the festival, only if her health does not deteriorate further on the day of the event.

Stay home and rest, as the cost of the ticket js a sunk cost and should not impact her current well$-$being