The correct answer should be: As the debt level increases, the firm faces worse incentives for management, which increase wasteful investment and perks, it is not always true. since increased debt provides interest obligations and place limit on managers.
Because all other statements are true. As optimal level of debt optimizes costs and benefits.
If debt becomes too large, firm value is reduced due to the mentioned reasons.
And if debt level increases, the firm benefit is T*D.
What is the Optimal Capital Structure?
An optimal capital structure is the best mix of debt and equity financing that maximizes a company's market value while minimizing its cost of capital.
Thus , we can say that all other statements are true, and the false statement is As the debt level increases, the firm faces worse incentives for management, which increase wasteful investment and perks.
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