Most scholars and scientists agree that modern humans originated in Africa.
In 1917 the British issued the Balfour declaration, in which they supported the establishment of a Jewish homeland in Palestine. The League of Nations confirmed a British Mandate on Palestine, after World War I, based on the British pledge to establish a Jewish homeland. In 1920 the first riots took place in Palestine in Jaffa against Jewish immigration. With the rise in power of the Nazis in Germany Jewish immigration to Palestine increased, the Arabs of Palestine objected and began a revolt against British control. The British first suggested the Peel Plan that would have created a very small Jewish states and a much larger Arab state. The Jews accepted but the Arabs turned it down. Soon after the British issued the "White Paper" limiting Jewish immigration to Palestine.
Here's what's happening: The oxygen in the air and the copper in the pennies form an oxide that coats the pennies and makes them look dirty. The acids (usually vinegar - acetic acid) break the copper oxide free from the penny. As we have seen experimentally, acid alone does not clean as well as acid and salt.
The answer would be B. is drier.
Hope this helps !
Photon
