What Is the Aim of the Discipline Called Earth System

What is the aim of the discipline called Earth System Science?

A) Understand how global climate change will influence the biosphere.
B) Explain how the atmosphere, geosphere and biosphere are linked and how the complex linkages affect life on Earth.
C) Explain the negative implications of putting fossil fuels into the atmosphere.
D) Determine how humans can reverse all of the damage they have caused.
E) Understand how Earth works and how it and life have evolved over 4.6 million years of existence.