Which of the Following Is True Regarding When a Strike

Multiple Choice

Which of the following is true regarding when a strike can be called?

A) The union may call a strike only if thirty percent of union members vote for a strike.
B) The union may call a strike only if a majority of the union's members agree.
C) The union may call a strike only if eighty percent of union members vote for a strike.
D) The union may call a strike only if ninety percent of union members vote for a strike.
E) The union may call a strike on its own, without a vote by union members.