The Following Questions Refer to the Cost Regression for Straker

The following questions refer to the cost regression for Straker Industries shown below.
Straker Industries estimated its short-run costs using a U-shaped average variable cost function of the form

and obtained the following results. Total fixed cost (TFC) at Straker Industries is $1,000.DEPENDENT VARIABLE:
‪
-The estimated short-run marginal cost function (SMC) at Straker Industries is:

A)

B)

C)

D)