Choose the Best Example of 'Systems Thinking' from the List

Multiple Choice

Choose the best example of 'systems thinking' from the list below:

A) Studying what the circulatory system does in the human body and how this system is affected by the social and physical environment.
B) Studying systems as if they have impermeable (solid) borders.
C) Studying air-quality as an isolated variable that can be reduced to its chemical properties.
D) Studying isolated genetic variables linked to the circulatory system.
E) Studying what the circulatory system does in the human body