At an international conference on global climate change, a representative of a developing

At an international conference on global climate change, a representative of a developing country admits that each year, his country contributes the same amount of greenhouse gases to the atmosphere as a particular developed nation. However, he argues that because his country has only 10% of the wealth of that developed nation, the developed nation should pay much more of the costs of adaptation. This representatives arguments illustrate the: 

(a) polluter pays principle. 

(b) precautionary principle. 

(c) equity principle. 

(d) conservation of the commons principle.