Michele is a stockholder of XYZ Corporation. The directors, as a group, have forced XYZ Corporation to commit an ultra vires act.Michele wishes to sue the directors on behalf of XYZ Corporation.In order to show more clout, Michele also wants all the other stockholders to be a party to this action, so she asks the court if she can represent all other stockholders as a group.This lawsuit is best described as:

a.A class action suit.

b.A derivative suit.

c.A class action, derivative suit.

d.An ultra vires suit.