___________ would create a natural monopoly.a.requirement of a government license before the firm can sell the good or serviceb.technology enabling a single firm to produce at a lower average cost than two or more firmsc.an exclusive right granted to supply a good or serviced.ownership of all the available units of a necessary input

The answer is b. Technology enabling a single firm to produce at a lower average cost than two or more firms.

Here's the step by step explanation:

A natural monopoly occurs when a single firm can supply a good or service to an entire market at a lower cost than could two or more firms. This typically happens when there are high fixed costs or other barriers to entry.

a. Requirement of a government license before the firm can sell the good or service - This is a legal monopoly, not a natural monopoly. The monopoly is created by the government, not by market conditions.

b. Technology enabling a single firm to produce at a lower average cost than two or more firms - This is a natural monopoly. If one firm has access to a technology that allows it to produce at a lower cost, it can undercut any potential competitors, effectively preventing them from entering the market.

c. An exclusive right granted to supply a good or service - This is also a legal monopoly, not a natural monopoly. The monopoly is created by the government granting exclusive rights, not by market conditions.

d. Ownership of all the available units of a necessary input - This could potentially create a monopoly, but it's not necessarily a natural monopoly. It depends on whether the input is naturally scarce or whether the firm has artificially cornered the market.