Use the Rational Zero Theorem, Descartes's Rule of Signs, and the Theorem

Multiple Choice

Use the rational zero theorem, Descartes's rule of signs, and the theorem on bounds as aids in finding all real and
imaginary roots to the equation.
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A) -1, 1, 7
B) -7, -i, i
C) -7, 7, i
D) 7, -i, i