Locate the error(s) in the following sentences and select the appropriate letter(s).

On the Island [A] of Kauai, I highly recommend the charms of the small town of Hanalei. Although I'm not terribly fond of Hawaiian cuisine, [B] in particular poi, you can readily get excellent fruit and seafood. Natural attractions include beautiful secluded beaches, Mt. Waialeale (which annually receives up to 400 inches of rainfall, making it one of the wettest locations on earth [C]), and the Napali Coast [D]. In fact, I'm a steady contributor to the Napali Coast rehabilitation organization. [E]

A
B
C
D
E

The punctuation error is at [C], where the comma should be inside the parenthesis. The mountain's name 'Mt. Waialeale' should also include 'okina and kahakō according to the Hawaiian language.

Explanation:

The error in the sentences provided is located at letter [C], where the parenthetical information closes with a comma outside the closing parenthesis. This error can be corrected by placing the comma inside the parenthesis. In addition, the name of the mountain 'Mt. Waialeale' should include the Hawaiian diacritical marks as 'Mt. Wai'ale'ale' to reflect accurate spelling consistent with the Hawaiian language which includes the glottal stop ('okina) and long vowels indicated by the macron (kahakō).