According to the e explanation, why is the element `2^{1"/"3}` considered algebraic over the field of rational numbers `QQ`:
A) Because `2^{1"/"3}` is a real number, and all real numbers can be expressed using rational coefficients in some polynomial.
B) Because `2^{1"/"3}` is a root of the polynomial `x^3 - 2`, which has integer coefficients, and this polynomial can be formed from rational numbers ?