Mark has a small business and he frequently dips into his savings to keep the firm afloat. He decides to invest all of his savings to maximize his returns over the next 5 years. He has a low to moderate level of risk tolerance and invests all his savings in real estate. Why is real estate not a productive choice of investment for Mark? O Real estate has low marketability risk. O Real estate investments decrease in value over time. O Real estate is the most liquid asset one can own. O Real estate is not a liquid investment option.