Pickets May Prevent Trucks and Railcars from Entering a Struck

Multiple Choice

Pickets may prevent trucks and railcars from entering a struck business because

A) the union has a legal right to obstruct the business of the employer they are striking against.
B) picketing during a strike carries a legal obligation on the part of the employer to cease operations, including delivery of goods and materials.
C) operators of trucks and railcars must get permission from the picketing union to enter the premises.
D) unions often refuse to cross another union's picket line.