With Regards to Common Situs Picketing

Multiple Choice

With regards to common situs picketing:

A) striking employees cannot legally picket neutral employers who share the same work site as the primary employer.
B) the union surrenders its right to strike.
C) the union is picketing in response to management refusal to bargain in good faith.
D) all of these
E) striking employees cannot legally picket neutral employers who share the same work site as the primary employer and the union is picketing in response to management refusal to bargain in good faith.