if, as a perfectly competitive industry expands, it can supply larger quantities at the same longminusrun market price, it

a. a fixedminuscost industry.
b. a constantminuscost industry.
c. an increasingminuscost industry.
d. a decreasingminuscost industry.

C. an increasing-cost industry.

Explanation:

Based on the information provided within the question it can be said that this is describing an increasing-cost industry. This is able to occur due to the amount of new firms entering the industry to compete, thus increasing demand, which in term causes the long-run cost curve to move upwards and increasing the minimum efficient scale of production at the same time.

the answer is account d

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