Answer:
b.if 100 units can be produced for $100, then 150 can be produced for $150, 200 for $200, and so forth.
Explanation:
Constant-cost means the cost of producing one unit of product does not change no matter how many products each firm in the industry decide to produce.
If the cost of production is $100 for 100 units, $150 for 150 units, $200 for 200 units and so forth, it means the unit production cost is a constant $1 regardless of the quantity to be produced.