The best answer is C. Tailings are dangerous because they can release toxic elements into the groundwater or surface water. Tailings are the waste materials after the process of extracting the valuable part in a mine. These waste materials have a big potential to destroy the environment because they can release toxic substances which include arsenic and mercury. These tailings can contaminate water bodies.
C. It begins with 3/8 and 1/3, and we need to make it 5/8 and 2/3, and the one that does that is C.
Based on the information given, it can be noted that the opening lines were A. stating factual details.
The opening line on the excerpt is "One of the first Chinese McDonald’s opened on April 23, 1992, in Beijing, the largest in the world, at the time".
It can be inferred that the author was stating factual details. This simply means that the author was stating facts rather than giving personal opinions.
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