Read the sentence.Conservationists are considering urban runoff and they are tracking population growth but the magnitude of the situation has not been determined.According to The Elements of Style, what is the correct way to punctuate this sentence?
Answer
A
Conservationists are considering urban runoff and they are tracking population growth, but the magnitude of the situation has not been determined.
B
Conservationists are considering urban runoff, and they are tracking population growth but, the magnitude of the situation has not been determined.
C
Conservationists are considering urban runoff, and they are tracking population growth, but the magnitude of the situation has not been determined.