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Which statement is correct for natural killer (NK) cells?
Philippines
An archipelagic country in Southeast Asia, consisting of more than 7,000 islands, known for its diverse culture, natural beauty, and colonial history.
Attack on Spain
This term lacks context but could refer to any military or aggressive action aimed at Spain throughout history, requiring specification of the event or period.
United States
A federal republic in North America comprised of 50 states, a federal district, five major self-governing territories, and various possessions.
Senator Albert Beveridge
An American historian and U.S. senator from Indiana, known for his support of American imperialism and expansionism in the early 20th century.
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