Which of these is an example of a labor law?
a. a limitation on building types in an industrial area.
b. a regulation against production limitation.
c. a requirement that products be truthfully labeled.
d. a restriction on when a union may call a strike.

D. A restriction on when a union may call a strike.

Explanation:

A labor law is concerned with the establishment of labor relation framework that provides peaceful relations between the employees and the organization. It usually includes the rules for forming a union. In this condition the union of labor or workers become a bargaining agent and conducts strikes and lock-outs to fulfill it's needs and present their grievances to the authorities.

The answer is D. A restriction on when a union may call a strike.

Explanation:

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete