(a) to exempt from the plan respecting promotion or research of a farm product any producer or class of producers;

(b) to appoint officers and employees, assign their duties and fix their remuneration;

(c) to undertake and assist in the promotion of the consumption and use of any farm product in relation to which it may exercise its powers, the improvement of the quality and variety of such farm product and the publication of information in relation to such farm product;

(d) to undertake or to engage other persons to conduct research activities with respect to, and advertise and promote in any other manner, the farm product in relation to which it may exercise its powers.