Answer: B. It supported the establishment of a Jewish homeland in Palestine.
Explanation: The Balfour Declaration was a public statement by the British Government, published during the First World War in 1917, which officially supported the formation of the Jewish State of Israel in Palestine. As stated in the Declaration, support for the establishment of a "national home for the Jewish people" has been announced. It was another in a series of support that existed on paper to help the Jews in forming the state, although the key role and practical creation of the state of Israel had the UN after WWII with its resolution, on the basis of which Israel was formed in 1948.