B sounds like a good choice to go for
Air pollution is a problem the United Kingdom has been facing for a long time. It brings about many health diseases such as strokes, asthma, and lung cancer among others. Air pollution is being measured and regulated constantly in order to meet the air quality targets. The UK's government is taking measures to improve pollution due to traffic, it is also constraining the use of coal in electrical power generation and it estimates that by 2040 the fossil fuel cars will be banned.
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The correct answer is c.: it served as the be boundary between North Korea and South Korea. The current line is in a similar place, but it's not a straight line, unlike the line running along the 39th parallel.
the question and answer appear to be unrelated
