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Question

In the proof that `beta` is algebraic over `F(alpha)`, why is it essential that `beta` is transcendental over F:
A) If `beta` were algebraic over F, transitivity would force `alpha` to be algebraic over F, contradicting `alpha's` given transcendence.
B) If `beta` were algebraic over F, the field `F(beta)` would not contain rational functions needed to define the polynomial p(x) ?