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Which sentence is the correctly written compound sentence? A. A meteorologist's weather forecast is based on studying changes in Earth's atmosphere. B. Meteorologists forecast the weather by studying changes in Earth's atmosphere. C. Meteorologists study changes in Earth's atmosphere, and they also forecast the weather. D. Meteorologists study changes in Earth's atmosphere, they also forecast the weather. can some one help me plz

Respuesta :

I'd say the correct answer is C. Because a compound sentence consists of at least two independent clauses, therefor A and B cannot be correct, because there is only one independent clause. D is also incorrect, because 'and' is redundant, it is not needed in this sentence. Therefore, you are left with C only. 
I qould say the awnser is B because of correct spelling and how it is writen with punctuation and word form