“Employment” does not include service performed by any of the following:
(a) The officers and director of a corporation who are the sole shareholders of the corporation and it is not subject to the Federal Unemployment Tax Act.
(b) The officers and director of a corporation engaged in agriculture who are shareholders of the corporation and it is not subject to the Federal Unemployment Tax Act.
(c) An officer of a corporation who is the sole shareholder, or the only shareholder other than his or her spouse, and the service is not subject to the Federal Unemployment Tax Act.