Q:Information: - Kuwait ('), officially the State of Kuwait ('), is a country in Western Asia. Situated in the northern edge of Eastern Arabia at the tip of the Persian Gulf, it shares borders with Iraq and Saudi Arabia. , Kuwait has a population of 4.2 million people; 1.3 million are Kuwaitis and 2.9 million are expatriates. Expatriates account for 70% of the population. - Iraq (, or ; '; '), officially known as the Republic of Iraq ('; ') is a country in Western Asia, bordered by Turkey to the north, Iran to the east, Kuwait to the southeast, Saudi Arabia to the south, Jordan to the southwest, and Syria to the west. The capital, and largest city, is Baghdad. The main ethnic groups are Arabs and Kurds; others include Assyrians, Turkmen, Shabakis, Yazidis, Armenians, Mandeans, Circassians, and Kawliya. Around 95% of the country's 36 million citizens are Muslims, with Christianity, Yarsan, Yezidism, and Mandeanism also present. The official languages of Iraq are Arabic and Kurdish. - Turkey, officially the Republic of Turkey (Turkish: ), is a transcontinental country in Eurasia, mainly in Anatolia in Western Asia, with a smaller portion on the Balkan peninsula in Southeast Europe. Turkey is a democratic, secular, unitary, parliamentary republic with a diverse cultural heritage. Turkey is bordered by eight countries: Greece to the west; Bulgaria to the northwest; Georgia to the northeast; Armenia, the Azerbaijani exclave of Nakhchivan and Iran to the east; and Iraq and Syria to the south. The Aegean Sea is to the west, the Black Sea to the north, and the Mediterranean Sea to the south. The Bosphorus, the Sea of Marmara, and the Dardanelles, which together form the Turkish Straits, divide Thrace and Anatolia; they also separate Europe and Asia. Turkey's location has given it geopolitical and strategic importance throughout history. - Syria, officially known as the Syrian Arab Republic (""), is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the west, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest. Syria's capital and largest city is Damascus. - Abu Abdallah Muhammad ibn Abdallah al-Mansur (744 or 745 785), better known by his regnal name al-Mahdi bi-'llah ("He who is guided by God"), was the third Abbasid Caliph who reigned from 775 to his death in 785. He succeeded his father, al-Mansur. - The Tigris and Euphrates, with their tributaries, form a major river system in Western Asia. From sources in the Taurus mountains of eastern Turkey they flow by/through Syria through Iraq into the Persian Gulf. The system is part of the Palearctic TigrisEuphrates ecoregion, which includes Iraq and parts of Turkey, Syria, Iran, Saudi Arabia, Kuwait and Jordan. - The IranIraq boundary runs for 1,458 kilometers, from the Shatt al-Arab (known as Arvand Rud in Iran) waterway to the tripoint boundary with modern Turkey at the Kuh e-Dalanper. Although the boundary was first determined in 1639, certain disputes fester, particularly disputes surrounding navigation on the Shatt al-Arab waterway. - Al-Mansur or Abu Ja'far Abdallah ibn Muhammad al-Mansur (95 AH 158 AH (714 AD 775 AD)) was the second Abbasid Caliph reigning from 136 AH to 158 AH (754 AD 775 AD) and succeeding his brother Abu al-'Abbas al-Saffah. Al-Mansur is generally regarded as the real founder of the Abbasid Caliphate, one of the largest polities in world history, for his role in stabilizing and institutionalizing the dynasty. He is also known for founding the 'round city' of Madinat al-Salam which was to become the core of imperial Baghdad. - Theophilus of Edessa ( 695 -- 785 CE ) , also known as Theophilus ibn Tuma and Thawafil , was a Greek medieval astrologer and scholar in Mesopotamia . In the later part of his life he was the court astrologer to the Abbasid Caliph Al - Mahdi . He translated numerous books from Greek to Syriac , including the Iliad . - The Euphrates (Sumerian: : "Buranuna", : "Purattu", : "al-Furt", : "Prt", : "Yeprat", : "Perat", ) is the longest and one of the most historically important rivers of Western Asia. Together with the Tigris, it is one of the two defining rivers of Mesopotamia. Originating in eastern Turkey, the Euphrates flows through Syria and Iraq to join the Tigris in the Shatt al-Arab, which empties into the Persian Gulf. - The Tigris is the eastern member of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of southeastern Turkey through Iraq and empties itself into the Persian Gulf. - Mesopotamia ("[land] between rivers"; from Ancient Armenian (Mijagetq); "bild ar-rfidayn" "miyn rodn"; "Beth Nahrain" "land of rivers") is a name for the area of the TigrisEuphrates river system, in modern days roughly corresponding to most of Iraq plus Kuwait, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish-Syrian and IranIraq borders. 'theophilus of edessa' is related to which object entity through the relation of 'country of citizenship'? Choices: - abbasid caliphate - armenians - iran - iraq - jordan - kuwait - lebanon - saudi arabia - syria - thrace - turkey
A:
abbasid caliphate