Nature is ______ and unchangeable, and it is ______ as to whether its hidden reasons and ______ are ______ to man or not. The option that best fill the blanks in the above sentence would be:

• A. relentless, indifferent, actions, understandable
• B. persistent, heartless, actions, comprehensible
• C. inexorable, apathetic, activities, explicable
• D. ineseapable, unconcerned, activities, intelligible