Local 326 of the Food and Allied Workers Union Went

Local 326 of the Food and Allied Workers Union went on strike. Their employer is a supermarket in the city of Toronto. Which of the following can the picketers legally do?

A) Completely prevent trucks bringing produce to the supermarket from crossing the picket line.
B) Completely prevent customers from crossing the picket line
C) Completely prevent fellow workers from crossing the picket line
D) Completely prevent replacement workers from crossing the picket line
E) Delay but not completely prevent supplier, customers, and fellow workers from crossing the picket line.