Analyze the concluding paragraph and answer the questions. In sh

Analyze the concluding paragraph and answer the questions.
In short, although the 20th century produced advantages by making some of us richer, healthier, and freer to enjoy our lives, it did not, in my opinion, make all of us wiser. The 20th century also made our world dirtier, our people less humane, and our spiritual lives poorer.
We wish to continue enjoying the benefits of technological advances because they free us to pursue other interests and goals. However, we must make a concerted effort to preserve our natural environment for future generations. Moreover, we should take the time now to make our lives more meaningful in the increasingly impersonal, mechanized world.
What is the primary purpose of the concluding paragraph?
A、To introduce new information not previously discussed in the essay.
B、To restate the thesis statement using different wording.
C、To provide a call to action or offer recommendations for the future.
D、To leave the reader with unanswered questions.
【正确答案】：C