Questions 39 and 40Choose TWO letters A-E.Write your answers in boxes 39 and 40 on your answer sheet.Which TWO of the following does the author concludeA．The very concept of a healthy suburban lifestyle is problematic.B．The speed of suburban growth has contributed to its imperfections.C．By thinking about human and ecological needs, suburbs can become better places to live.D．Developers will have to think about ways of living that do not require suburbs.E．Suburbs have their downsides, but they are the best way for parents to raise children. 40（）