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 other methods does the writer use to conclude the essay?
A、The writer introduces new arguments not discussed in the essay.
B、The writer restates the thesis statement in different words.
C、The writer makes a call to action or provides recommendations for the future.
D、The writer ends abruptly without providing a conclusion.
【正确答案】：C