Which of the following is true? I. If there is no change in gross fixed assets from one year to the next, then net fixed assets would have to have decreased. II. For firms with lower P/E ratios, investors are valuing each dollar of earnings more than for firms with higher P/E ratios. III. A increase in the current ratio indicates an improvement in a firm's long-term solvency condition. A. I only B. I and II only C. II and III only D. I and III only