The correct answer is: The British had promised Palestine to multiple groups of people.
The Balfour Declaration, issued by the British government in 1917, expressed support for establishing a "national home for the Jewish people" in Palestine. However, during World War I, the British also made promises to the Arab leaders regarding independence and control over Palestine and other territories. This conflicting set of promises created significant tensions and resulted in enduring conflicts in the region, as both Jewish and Arab populations believed they had legitimate claims to the land. The failure to resolve these competing national aspirations has been a source of ongoing strife and problems in Palestine.