老师能解释下C是啥不？

NO.PZ2022120701000029 问题如下 Whiof the following carbon pricing metho is usecompanies to termine the impaof climate change on the profitability of a new project? A.Carbon taxation B.Shaw carbon pricing C.Emission trang system (ETS) internor shaw prion carbon creates a theoreticor assumecost per tonne of carbon emissions This is useto better unrstanthe potentiimpaof future climate regulation on the profitability of a project, a new business mol, or investment 这个界面并不能调整，我忘了是A还是B，但是碳税确实也是公司给产品定价时必须要考虑的因素啊。