Which statement is true?

A) The capacity utilization rate for manufacturing firms usually ranges from 80 to 85 percent.
B) Net investment can be negative.
C) The most important determinant of the level of investment is the sales outlook.
D) All of the statements are true.

All the statements provided are true. The capacity utilization rate for manufacturing firms typically does range from 80 to 85 percent, indicating a healthy level of operation without overextending resources. Net investment can indeed be negative, which occurs when depreciation on assets exceeds the investment in new assets. Finally, the sales outlook is a crucial determinant of the level of investment, as firms are more likely to invest when they anticipate higher future sales.