The barrier to entry which requires electricians to be licensed is an example of

A) government rules.
B) economies of scale.
C) patents.
D) ownership of a scarce factor of production.

Government Rules

Regulations and guidelines established by government authorities to govern behavior, enforce standards, and protect the public interest.

Economies Of Scale

The cost per output unit tends to decrease as the operational scale increases, providing companies with financial advantages due to their size.