The correct option is D): Corporation.
A corporation is a type of company which involves a group of people that is certified to act as a unique single entity recognized by law. The owners of this type of company are shareholders or stockholders who both participate in the gains and losses of the corporation.
For the company to become legal, the authorities should fill a document in which they should include certain information such as objectives, future plans, operations. This important document is called the corporate charter.