Answer:
c. a resort condominium project in which owners enter their units in a common rental pool to enhance their income
Explanation:
As provided, the company here aggregates funds to acquire property and then earn rental income. The company can be a combination of many individuals or firms or any other form. But since it is earning an assured income in the form of rentals, it can be categorized as security.
Accordingly if it is a security, the security laws will be applicable on them.
Option a and b do not provide so, as they do not form a security, as in case a there is no definite income attached. In case b there are losses also attached, as it is for residential and retail in the same volume, making it loose its commercial substance.