Final answer:
To change the company name from D Inc to S Inc, both the board of directors' approval and a majority shareholder vote are typically required. Major shareholders can significantly influence such decisions but may still require additional support to achieve the majority needed.
Step-by-step explanation:
When a shareholder like G wants to propose a change to the company name from D Inc to S Inc, the approval typically must come from the board of directors and then by a majority vote of the shareholders. In many cases, this means more than 50% of the votes from all outstanding shares must be in favor of the amendment. Considering that some investors in a company can hold significant amounts of shares, like those of The Darkroom Windowshade Company, these major shareholders have considerable influence over such decisions.
In the scenario of The Darkroom Windowshade Company, investor 1 with 20,000 shares and investor 2 with 18,000 shares combine to hold 38,000 shares. To vote to change the company's top management or make major decisions, a majority of more than 50% is required. In this case, this means more than 50,000 shares. Investors 1 and 2 together do not reach this threshold since they have 38,000 shares, therefore they cannot always be certain of getting their way. They would need additional support from other shareholders to reach a majority.