I would choose A. But that's a recommended answer from my teacher<span />
Here is the answer
https://www.science.edu/Acellus/curriculum/career-technical-education-courses/lesson-lists/Business%20Management%20Curriculum.pdf
The reason that the environmental optimist are not to be
concerned with the depletion of natural resources is because of technological
innovation in which they believe that this allows or has the capability of
developing synthetic materials in which can replace the natural resources that
are depleted.