Which war? WWI: We were isolationists until illegal German U-boats sank a United States commercial ship called the Lusitania.
WWII: We were isolationists until December 7, 1941 when the Japanese air fleet surprise attacked and bombed us at Pearl Harbor.
They were in the middle of the desert. It would be a large risk to trek through such a large desert to attack them.
"<span>They found the soil unusable, and they had to rely on fishing and hunting for food" is generally true, although some people were able to soil rich enough for farming. </span>
The Answer is D.Great Britain tax's and trade laws hurt the colonial economy