Concept:A consortium is a voluntary association of independent companies that come together to execute a project too large for any one of them to handle alone.
Explanation:Some projects require more capital, expertise, or manpower than a single company can provide.
When two or more companies agree to pool their resources for such a project, they form a business alliance.
Each company in this alliance keeps its separate legal identity and independence.
This is what makes it different from a merger or an amalgamation, where the firms lose their individual existence.
It is also different from a cartel, which usually involves agreements to fix prices or control supply in a market.
In a consortium, the companies simply collaborate to achieve a common objective, such as building a large bridge, dam, or refinery.
After the project is completed, the consortium may be dissolved or continue for other ventures.
Therefore, the term that best describes this type of arrangement is a consortium.
Answer:D. a consortium