Final answer:
The correct answer is option b) 'School is canceled today, because there is too much snow on the roads,' as this option uses the correct coordinating conjunction 'because' to form a compound sentence.
Step-by-step explanation:
To combine two simple sentences into a compound sentence, you would use a comma and a conjunction. In this case, the conjunction that correctly establishes the reason for school being canceled is 'because.' Therefore, option b) is correct: School is canceled today, because there is too much snow on the roads.
The other options either misuse conjunctions or fail to create a compound sentence that conveys the intended meaning.
A compound sentence consists of two or more independent clauses connected by coordinating conjunctions such as 'for,' 'and,' 'nor,' 'but,' 'or,' 'yet,' and 'so,' which can be remembered with the acronym FANBOYS.
The given example School is canceled today, because there is too much snow on the roads. follows this structure as it connects two independent thoughts to explain the cause of school cancellation, making it a perfect illustration of a compound sentence.