I need help, I don't understand this exercise very well.

On November 15 , Alex and Deanna Kent come to you for tax advice. The Kents, a married couple that files a joint tax return, own a rental home in Southern California. From January to November 1 of the current year, they rented out the home for 210 days. Since they live in Minnesota, they are considering staying in their rental home from December 10 to 31 . If they do not stay in the home during that period, it will sit vacant. They ask you if this decision would have any tax consequences. They also provide you with the following information for the year: What do you recommend to the Kents