Question: Which island, included in the Eastern Caribbean portion of the US Ambassadorship to  Barbados, has its highest point, Morne Diablotins, at 1447m?

Context articles: Picard River
Laudat
List of mountains of Dominica
Morne Watt
Batali River
Dominica
United States Ambassador to Barbados
Dublanc River
Morne Diablotins
United States Ambassador to Antigua and Barbuda

The Picard River is a river in Dominica.
 It rises on the northern slopes of Morne Diablotins, flowing northwest to reach the Caribbean Sea at Prince Rupert Bay on the country's northwestern coast, close to the town of Portsmouth.
Laudat is a small village in the interior of Dominica, nestled between 3 mountains: Morne Watt, Morne Micotrine (Morne Mackak), and Morne Trois Pitons.
 With a population of just above 300 persons, Laudat is referred to as a "gateway" because it is the sole entry point to many of the islands most spectacular sights, including the Boiling Lake, Fresh Water Lake, and Titou Gorge, among others.
 Perched about 1200 feet above sea level Laudat boasts a cool climate and spectacular views of the Caribbean Sea.
 It is located approximately 20 minutes from the capital, Roseau and is literally the end of the road (there is no alternative but to turn around to exit) The road to Laudat used to be a hair-raising ride up the mountains, around blind hairpin turns with sharp drop-offs into the jungle canopy; however, the road has been improved and may be completed by the time of this writing.
 Laudat has seen many changes over the past years, including the aerial tram taking visitors from the village up into the high mountains--making possible what was previously a daunting journey by foot, to even the least athletic visitors.
 Titou Gorge was also altered over the last decade and is now considerably smaller and more developed.
 It is still a great place to swim, and small waterfalls of hot and cold water stream into the gorge.
 There are some overnight accommodations available in the village.
 There are also a few small shops of the kind typically found throughout the Caribbean; rum, soft drinks and a few grocery and household items can be found.
 Laudat receives some of the highest rainfalls in the Caribbean, about 900 cm a year.
 The air is often misty and cool, and is a refreshing change from the blazing heat of the low areas.
Dominica is an island-nation in the Caribbean Lesser Antilles.
 The highest mountain peak on Dominica, at 4,747 ft, is Morne Diablotins, which is also the second highest mountain in the Lesser Antilles.
Morne Watt (Watt Mountain) is a stratovolcano in the south of the island of Dominica.
 It rises to a height of 1,224 m (4,016 ft) and is the third highest peak in Dominica (after Morne Diablotins and Morne Trois Pitons).
 A major eruption from Morne Watt producing pyroclastic flows took place about 1300 years ago.
 A moderately large phreatic eruption took place at the Valley of Desolation thermal area NE of Morne Watt in 1880, when volcanic ash fell over a 4-km-wide sector at the coast, 10 km from the vent.
 A smaller phreatic eruption, and the most recent eruption, occurred in July 1997, when ashfall was confined to the Valley of Desolation area.
 It had a VEI of 1.
The Batali River is a river in Dominica.
 It rises on the southern slopes of Morne Diablotins, flowing southwest to reach the Caribbean Sea on the country's northwestern coast, close to the town of Barroui.
Dominica ( or ; French: "Dominique" ; Island Carib: "Wai‘tu kubuli" ), officially the Commonwealth of Dominica, is a sovereign island country.
 The capital, Roseau, is located on the leeward side of the island.
 It is part of the Windward Islands in the Lesser Antilles archipelago in the Caribbean Sea.
 The island lies south-southeast of Guadeloupe and northwest of Martinique.
 Its area is 750 km2 , and the highest point is Morne Diablotins, at 1447 m in elevation.
 The population was 71,293 at the 2011 census.
The United States Ambassador to Barbados is the official representative of the government of the United States to the government of Barbados.
 The title of the ambassador is United States Ambassador to Barbados and the Eastern Caribbean and is concurrently the ambassador to Antigua and Barbuda, Dominica, Grenada, St. Kitts and Nevis, St. Lucia, and St. Vincent and the Grenadines, while resident in Bridgetown, Barbados.
The Dublanc River is a river in Dominica.
 It rises on the northwestern slopes of Morne Diablotins, flowing west to reach the Caribbean Sea on the country's northwestern coast.
Morne Diablotins is the highest mountain in Dominica, an island-nation in the Caribbean Lesser Antilles.
 It is the second highest mountain in the Lesser Antilles, after La Grande Soufrière in Guadeloupe.
 Morne Diablotins is located in the northern interior of the island, about 15 miles north of Dominica's capital Roseau and about 6 miles southeast of Portsmouth, the island's second-largest town.
 It is located within Morne Diablotin National Park.
The United States Ambassador to Antigua and Barbuda is the official representative of the government of the United States to the government of Antigua and Barbuda.
 The title of the ambassador is United States Ambassador to Barbados and the Eastern Caribbean and is concurrently the ambassador to Barbados, Dominica, Grenada, St. Kitts and Nevis, St. Lucia, and St. Vincent and the Grenadines, while resident in Bridgetown, Barbados.
 The official title of the ambassador is "Ambassador Extraordinary and Plenipotentiary of the United States of America to Barbados and the Eastern Caribbean".