Unfair competition refers to all acts that violate the business ethics and business customs, especially the production and management of goods in violation of relevant laws. It includes monopolistic behavior, restricting competition, and the use of deception, coercion, inducement, slander, embezzlement and other immorality by operators The act of engaging in market transactions. According to the above definitions, Which of the following are unfair competition:. ['Deceptive trading behavior, improper sales behavior, refusal to "three guarantees" behavior.', 'Defamation of competitors, commercial bribery, non-compliance mark.', 'Degrading competitor behavior, conditional transaction behavior, agreement-restricted competition behavior.', 'Infringing on trade secrets, not issuing shopping invoices, and ignoring consumer rights.']