According to the Labor Dispute Mediation and Arbitration Law, there are () people who can serve as labor dispute arbitrators.

Answer: a, c, d, e

This topic examines the conditions of labor dispute arbitrators. The labor dispute arbitration commission shall establish a roster of arbitrators. Arbitrators should be fair and upright, and meet one of the following conditions: (1) have served as judges; (two) engaged in legal research and teaching, and with intermediate titles or above; (3) Having legal knowledge and having been engaged in professional work such as human resource management or trade unions for five years; (4) A lawyer has been practicing for three years. (Test site: conditions for labor dispute arbitrators)