Which of These Is NOT a Reason Carbon Is Thought

question 7

Multiple Choice

Which of these is NOT a reason carbon is thought to be the element on which complex extraterrestrial life is based?

• A) Carbon forms chemical bonds that are both strong and flexible.
• B) Every life-form on Earth is carbon-based, over an immense range of conditions.
• C) Carbon releases a significant amount of energy when it combines with hydrogen.
• D) Carbon provides a basis for forming long, complex chains of molecules.

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