The slope of the consumption function is (消费函数的斜率是——中文由在线翻译而来，仅供参考)
选项：

A: less than the slope of the 45-degree line but not equal to zero.小于45度线的斜率，但不等于零。
B: greater than the slope of the 45-degree line.大于45度线的斜率。
C: equal to the slope of the 45-degree line.等于45度线的斜率。
D: equal to zero.等于零。