Solve the equation in the complex number system.x7 - 1 = 0
A. 1, cos(51.4°) + i sin(51.4°), cos(102.9°) + i sin(102.9°), cos(154.3°) + i sin(154.3°), cos(205.7°) + i sin(205.7°), cos(257.1°) + i sin(257.1°), cos(308.6°) + i sin(308.6°), -1
B. -1, cos(25.7°) + i sin(25.7°), cos(51.4°) + i sin(51.4°), cos(77.1°) + i sin(77.1°), cos(102.9°) + i sin(102.9°), cos(128.6°) + i sin(128.6°), cos(154.3°) + i sin(154.3°)
C. 1, cos(25.7°) + i sin(25.7°), cos(51.4°) + i sin(51.4°), cos(77.1°) + i sin(77.1°), cos(102.9°) + i sin(102.9°), cos(128.6°) + i sin(128.6°), cos(154.3°) + i sin(154.3°)
D. 1, cos(51.4°) + i sin(51.4°), cos(102.9°) + i sin(102.9°), cos(154.3°) + i sin(154.3°), cos(205.7°) + i sin(205.7°), cos(257.1°) + i sin(257.1°), cos(308.6°) + i sin(308.6°)
Answer: D
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