Answer: Option (D) is correct.
Explanation:
The free rider problem arises when the burden of a shared product transfer on one person, since both are enjoying the utilities derived from that product.
Other person refuses to pay for the shared product's burden and having a free ride.
In this question, there are three home owners and all of them are interested for fixing a security lighting in the parking lot.
Since, one of the homeowners installed that lights and asked others to pay for the product as they are also getting utilities from the security lightning.
But they refuses to contribute towards cost of security lightning in the parking lot. Hence, they are free riders.