4 Comparison effect: Refers to the mutual influence of some related economic variables in social and economic activities or the economic interest subject in the distribution of benefits, and the phenomenon of taking turns to advance. Which of the following is the comparison effect? ['A and B are more beautiful than their wives, and agree that the loser invites the other to drink.', 'The employees of the enterprise compare with each other in terms of wages and incomes, and require the unit to increase wages and increase income.', 'A technician from Company A visited the workshop of Company B, and secretly resolved to learn from Company B.', 'After comparing the number of thieves captured by the Public Security Bureaus of the two counties, the Provincial Public Security Department considered that County A had a good law and order situation.']