Figure 12-3 -Refer to Figure 12-3.Which of the Following Statements Best Captures

Figure 12-3
-Refer to Figure 12-3.Which of the following statements best captures the nature of the underlying production function (not pictured) ?

A) Output increases at a decreasing rate with additional units of input.
B) Output increases at an increasing rate with additional units of input.
C) Output decreases at a decreasing rate with additional units of input.
D) Output decreases at an increasing rate with additional units of input.