Lamar Corporation originally purchased land for $20,000. It later sold the land for $20,000 in cash. Which of the following is true of the effect of the sale of land on the accounting equation? O A. assets increase by $20,000; equity increases by $20,000 O B. the amount of total assets remains the same O C. assets increase and liabilities decrease by $20,000 D. assets and equity increase by $40,000