Final answer:
A trade alliance is not a legal structure for an entrepreneurial company; it refers to a partnership between organizations. Proprietorship, corporation, and partnership are proper legal structures for a business. The correct answer to the question is 'd. Trade alliance'.
Step-by-step explanation:
When choosing a legal structure for an entrepreneurial company, there are several forms to consider. These include sole proprietorship, partnership, and corporation. A sole proprietorship is an individual-owned business, while a partnership involves two or more individuals co-owning a business. A corporation is a more complex structure involving shareholders. Each of these forms has its own legal implications and tax considerations.
The term trade alliance, however, generally refers to a collaboration between businesses or organizations to advance shared interests or engage in joint trade practices, rather than a specific legal structure for operating a business itself. Therefore, among the given options, a trade alliance is NOT an appropriate legal structure for an entrepreneurial company.
To summarize, the appropriate legal structures for an entrepreneurial company are a proprietorship, partnership, and corporation. Option 'd' Trade alliance is not a legal structure for a business but rather a collaboration strategy among businesses.