How many unique rectangles can be formed by joining 231 identical squares? All 231 squares must be used and no square can overlap each other.
A. 3
B. 4
C. 237
D. 5
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International relations is an area of study dealing with the interrelationships among nation-states in an age in which nation-states are the principal holder of political power. The study concerns itself with the outcomes of war and peace; consequently, it has practical importance. However, the change in practice has generated considerable confusion as to who are involved as the principal actors; since there are different kinds of state and non-states actors.
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