D is corrent. The requirement is to identify the type of entity whose formation does not require state approval. A general partnership is a common law entity that does not require a filing with the state in which the entity is formed.
A is incorrect because a limited liability partnership is a creature of statute that requires filings with the state of formation.
B is incorrect because a limited liability company is a creature of statute that requires filings with the state of formation.
C is incorrect because a corporation is a creature of statute that requires filings with the state of formation.
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