Some Peoples Collected Outside the Police Station to Protest Over

Some peoples collected outside the police station to protest over police inaction in connection with the murder of child. They were charged as committing criminal trespass.

A) They cannot be held liable as such persons do not form unlawful assembly.
B) They can be held liable for criminal trespass.
C) They cannot be held liable as to protest is a fundamental right.
D) None of the above.