：Marshall-Lerner condition is that the payments deficit will be improved as a result of currency depreciation only if_______ .A:the sum of elasticity of demand for goods import and that for goods export  is larger than one.B:the sum of elasticity of demand for goods import and that for goods export equals one.C:the sum of elasticity of demand for goods import and that for goods export is less than one.D:the sum of elasticity of demand for goods import is greater than that for goods export.答案: the sum of elasticity of demand for goods import and that for goods export  is larger than one.8、