24. Although many people are aware of the importance of a clean and safe environment, they are
damaging it.
A. Although many people are aware of the importance of a clean and safe environment but they are
damaging it.
B. Many people are aware of the importance of a clean and safe environment. However, they are
C. Although they are damaging it, many people are aware of the importance of a clean and safe
environment.
D. They are damaging it but many people are aware of the importance of a clean and safe environment.
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