Respuesta :
The answer is B.
Philadelphia has many historic buildings, beautiful parks, and excellent restaurants.
Philadelphia has many historic buildings, beautiful parks, and excellent restaurants.
Your answer is B. For parallelism to be correct in a coordinated phrase, all the phrases linked must belong to the same category. In B, "Philadelphia has many historic buildings, beautiful parks, and excellent restaurants"; the conjuction "and" links NPs: many historic buildings, beautiful parks and excellent restaurants. Each of these NPs is modified by an AdjP (adjetival phrase) making all the noun phrases to weitgh the same.