The most accurate way to describe the excerpt is to choose the option - it is a dependent clause. This means that something needs to be added - you need to finish the sentence so that it becomes an independent clause, and not a subordinate one.
“The speed limit should be lowered for safety reasons” would be the best answer. All of the other sentences are too informal. When writing an opinion piece you want to have somewhat of a conversational tone but you shouldn’t use words like “totes” and “gotta”. I’m the end, it is a formal paper stating your opinion and should be professional.
I'm not sure about the Great Britain and Us conflict but I do know that the Mexican American war was the war for the possession of Texas? That may be a contrast you may include. I hope this helps.
A. The commas are needed between their names as they are separating different clauses. <span />
