The Following Question Are Based on the Following Table

The following question are based on the following table:

-A firm is able to purchase 1 unit of raw material for $2 and convert that unit into a finished product that sells for $25.Four production techniques are available,as shown in the table.If labor costs $1 per hour and machine time costs $3 per hour,the firm should

A) use technique A.
B) use technique B.
C) use technique C.
D) use technique D.
E) not produce at all.