It is too cold to attend school is when the roads are icy and when the school is snowed in.
According to The Elements of Style, the correct way to punctuate this sentence is, Conservationists are considering urban runoff, and they are tracking population growth, but the magnitude of the situation has not been determined.
Answer: Option C.
Explanation:
Punctuations are the marks such as comma, semicolon, exclamation that we use while writing. Punctuation helps to give a clear meaning to the sentence. ‘The Elements of style’ is a book written by William Strunk which describes the proper way of writing style.
From the sentences given below, the correct way to punctuate this sentence is, ‘Conservationists are considering urban runoff, and they are tracking population growth, but the magnitude of the situation has not been determined.’ Here we can see that after the dangler is separated with a comma. Apart from this in the first line, two ideas are being discussed which is further separated by adding comma thus making a sentence readable.
Either add the passage with the question so we know what you are referring to or do not post questions like these. Not everybody has read what you have. This question is completely useless and unanswerable without the story to go off of.