The best and most correct answer among the choices provided by the question is a. There<span>.
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<span>"T"here is one thing every visitor should know: the city is divided into five regions, and each has many educational and cultural attractions.
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B one half because g<span>enerally, </span>hyphenate<span> two or more </span>words<span> when they come before a noun they modify and act as a single idea.</span>