The large income gap may not cause social turmoil. The key lies in the cause of the large gap. Clear accounting can avoid cowardice and exploitation is no longer possible. The confused accounts in economic exchange often become the cause of internal friction. According to this article, what is the correct understanding? ['The widening income gap will inevitably lead to the intensification of contradictions.', 'Exploitation is bound to occur in the course of economic interaction.', 'Economic disputes are often caused by unclear accounts.', 'Labour income issues are determinants of social stability.']