Mark the letter A, B, C, or D to indicate the correct response to each of the following exchanges. Two friends Nam and Lan are talking about the topic of global warming.
Nam: What are the main threats to the environment today?
Lan: ____
A. Threats are possible dangers to the environment.
B. Probably deforestation and global warming.
C. Environmental pollution is a big issue for our planet
D. We need a clean environment to live in.
