Answer: (A) Stakeholder
Explanation:
The stakeholder is refers to the person in an organization that basically helps in managing all the stake in business either in external or internal type.
The main responsibility of stakeholder is to managing the resources in an organization and managing all the investment related business approach and the supply chain.
According to the given question, Vincent is the retired CEO of the company and he investing the capital in the startup company that helps in creating the software.
Therefore, The Vincent is basically refers to the startup firm's stakeholder.