The best way to combine the ideas in sentences 14 and 15 is option C:
What is the however rule?
A contrast or opposition between two independent clauses is introduced by the conjunction "however." Consider it to signify in contrast, but, or on the other hand. One method to use although in this context is to place a semicolon before and a comma after it: The vehicle was stunning, but it consumed a lot of petrol.
By altering sentence structure, sentence combining "smooths out" rough writing and makes a piece of writing more interesting for the reader.
Therefore, the use of "However: is most frequently used as a connecting word between two sentences or clauses to highlight a conflicting idea. However is also referred to as a conjunctive adverb or a transitional word in this context. It frequently appears in formal writing and speaking.
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