When discussing measurements, nearly all units of measure are expressed in plurals. For example: "He is 5 feet 8 inches tall." (Feet and inches are plural.) "She weighs 120 pounds." (Pounds is plural.) "It's 600 miles from Los Angeles to San Francisco." (Miles is plural.) Also, there is no need to add hyphens ("-") between any of the words. So "A" is wrong because the unit of measure (meter) is not plural and there are unnecessary hyphens. Is D a phrase? I would call it an adjective phrase. It is phrase used to describe the Eiffel Tower. For example, "The Eiffel Tower is expensive, impressive, and 320 meters tall." In this sentence, "expensive", "impressive" and "320 meters tall" are all used to describe the Eiffel Tower. "expensive" and "impressive" are adjectives, and "320 meters tall" is an adjective phrase.

D. :-)