Which of the following answers is most likely a variable cost?

Multiple Choice

a. A cost that is $11,200 when 32,000 units are produced, and $11,200 when 35,100 units are produced.

b. A cost that is $11,200 when 32,000 units are produced, and $12,285 when 35,100 units are produced.

c. A cost that is $11,200 when 32,000 units are produced, and $22,400 when 35,100 units are produced.

d. A cost that is $22,400 when 32,000 units are produced, and $22,400 when 35,100 units are produced.