When long-run average costs increase as a result of industry growth, there are

A) internal economies.
B) internal diseconomies.
C) external economies.
D) external diseconomies.

Internal Diseconomies

Increased per unit costs that occur when a firm or industry grows beyond a certain size, leading to inefficiencies.

External Diseconomies

Negative effects experienced by third parties or the general public due to the activities of a business or industry, not reflected in market costs.