Which of the following is LEAST likely to fall under the legal definition of picketing?

Select one:

A.blockading the employer's premises with cement barricades, with signs posted to them regarding the strike.

B.a single striking employee waiving a placard with the intent to secure a sympathetic response from an audience of onlookers

C.a group of striking employees posting messages on a company-only discussion board on the Internet

D.a group of striking employees having a sit-in on the front steps of the workplace, engaging in discussion about the workplace issues with those who approach

E.a group of striking employees waving placards with the intent to secure a sympathetic response from an audience of onlookers