question: Why is retained earnings on December 31, 2018, equal to $80,000 in all three cases despite the reporting of different amounts of net income each year?

Is it A,B, or C?

A: Net income over sufficiently long time periods equals cash inflows minus cash outflows. Walmart acquired the land in 2016 for $100,000 and sold it for $180,000 in 2018. Thus, the total effect on net income through the realization of the increase in the va

B: Net income over sufficiently long time periods equals cash inflows plus cash outflows. Walmart acquired the land in 2016 for $100,000 and sold it for $180,000 in 2018. Thus, the total effect on net income through the realization of the increase in the val

C: Net income over sufficiently long time periods equals cash inflows minus cash outflows. Walmart acquired the land in 2016 for $100,000 and sold it for $180,000 in 2018. Thus, the total effect on net income through the realization of the increase in the va