What is a big factor in why the Arctic is warming twice as fast as the rest of Earth?

The Arctic has warmed at about twice the rate of the entire globe over the past 30 years, a phenomenon known as Arctic amplification. The majority of scientists believe that this rapid warming is a sign of climate change caused by humans. Arctic amplification is not the only evidence in the Arctic of rapid climate change.

Urban growth invariably feeds increased commercialization and industrialization. it requires continually expanding land areas. when urbanization rates are high, and countries do not have the institutional and managerial capacities or economic wherewithal to manage such rapid growths, they exert intense pressure on the types and nature of the resulting settlements. they contribute to the development of overcrowded slums and shanty towns without adequate essential services and necessary infrastructure.-by asit k. biswas and cecilia tortajada

Ithink the answer is b. shakeri hope im not wrong : )