How Does Advice to Clients from Lawyers Differ from Advice

How does advice to clients from lawyers differ from advice given clients by public relations practitioners?

A) Lawyers advise clients what they should do, within the letter of legal requirements, to defend themselves in the court of public opinion.
B) Public relations practitioners advise clients what they must do to defend themselves in a court of law.
C) Lawyers advise clients what they should do, within the letter of legal requirements, to defend themselves in a court of law.
D) Public relations practitioners advise clients what they should do to defend themselves in the court of public opinion.