Which of the Following Statements Is Correct with Respect to Picketing

Which of the following statements is correct with respect to picketing?

A) Lawful picketing is an accepted form of protest by workers whether or not a lawful strike is in process.
B) Lawful picketing can take place during a rights dispute or a recognition dispute.
C) Lawful picketing is the process whereby striking employees forcefully prohibit others from doing business with their employer.
D) Lawful picketing cannot take place during a lockout, only during a lawful strike.
E) Lawful picketing is the process whereby striking employees attempt to persuade people not to do business with their employer.