Final answer:
Starwood is the parent company among the given options, as it owned multiple hotel chains before its acquisition by Marriott International.
Step-by-step explanation:
The entity classified as a Parent Company that consists of multiple chains among the options provided is c) Starwood. Starwood Hotels and Resorts Worldwide, Inc. was a leading hotel and leisure company that operated multiple hotel chains before being acquired by Marriott International. The other entities listed, such as Hampton Inn, Courtyard, and Holiday Inn Express, are individual hotel chains that fall under larger parent companies.