c答案如何理解

问题如下：

Which of the following descriptions about Giffen goods is least appropriate?

选项：

A.

The slope of demand curve is negative.

B.

Giffen goods are inferior goods.

C.

Income effect is large than substitution effect for this good.

解释：

A is correct.

The demand curve of Giffen goods has a positive slope.

考点：吉芬商品

解析：对于吉芬商品，价格上升的情况下，商品的需求量也同步上升，这会表现为需求曲线向上倾斜，斜率为正，所以A选项入选。

吉芬商品是一种劣等品，所以B选项不入选。

对于吉芬商品，收入效应和替代效应方向相反，并且收入效应会超过替代效应，所以C选项不入选。