题目内容：
30.Many Filipinos have started questioning if the Subic Bay National Station should be allowed to continue, when _______. (American Military Bases in the Philippines)A)the local economy stopped benefiting from the naval base
B)the tensions between the local Filipinos and the Americans at the base ran high
C)tens of millions of dollars were poured into the city annually
they became aware of the naval base’s widespread influence on the city’s economy and
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