This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to get rich quick
Rent out a room in your home.
If you have an extra bedroom in your home and are willing to share your living space, temporarily renting out the space is a great way to make extra money. If renting for more than a week or two, draw up a lease agreement with your new tenant to help circumvent any disputes.

Available choices:
(a). Tenants must agree not to share any decor in the room, not even photos of pets. Once you rent space, you may be able to sell furniture, other essentials, or sell necessary items under increased profits.
(b). For example, if you have a roommate that you can temporarily rent, make sure to lease to less than 6 months. If that extra month is longer than the rental agreement, you will likely need a new roommate as well.
(c). If you have an older person living in the home, be respectful of your older back or relative's needs. They might be small-term, after having lived with you for several years.
(d). Renting a room or your entire home to people on vacation is another way to increase your income. Websites like airbnb will facilitate the renting process for a cut of the money that renters will pay.
The answer is:
(d).