The correct answer is B. 350 South Merryhill Road, Huntington, West Virginia
Step-by-step explanation:
In the English language, all proper names are capitalized this includes the name of streets, avenues, roads, cities, among others. Besides this, words that indicate direction such as "north" or "southwest" should be only capitalized in the case they represent specific regions or appear as part of a proper name. This means, in the case presented all words should be capitalized, this includes "Merryhill Road", "Huntington" and "Virginia" but also the words "South" and "West" because they are part of proper names and refer to specific regions. Thus, the correct answer is "350 South Merryhill Road, Huntington, West Virginia".