![](https://lstatic.shangxueba.com/jiandati/pc/images/pc_jdt_tittleico.png)
Why does Frank think they should increase the new product price?
A、A. They have three new herbal ingredients in the formula.
B、B. The production cost is 5% higher.
C、C. This shipping cost is rising too.
D、D. The production line is more efficient than before.
![](https://lstatic.shangxueba.com/jiandati/pc/images/jdt_panel_vip.png)