A firm has a fixed production cost of ​$1 comma 000 and a constant marginal cost of production of ​$100 per unit produced. What is the​ firm's total cost​ function? A. TCequals 1 comma 000 . B. TCequals 100 q. C. TCequals StartFraction 1 comma 000 plus (100 q )Over q EndFraction . D. TCequals 1 comma 000plus​(100​q).