Use the Following Table to Answer the Questions

Multiple Choice

Use the following table to answer the questions :
Table 7-4 shows the shows the quantities of labor and capital required to produce various levels of output.

-Refer to Table 7-4.When the firm increases production from 24 units of capital and 8 units of labor to 48 units of capital and 16 units of labor,the production function exhibits:

A) decreasing marginal rate of technical substitution.
B) constant returns to scale.
C) increasing returns to scale.
D) diminishing marginal returns