The 10-meter beam AB rests upon, but is not attached to, supports at C and D. Neglecting the weight of the beam, determine the range of values of P for which the beam will remain in equilibrium.
A) P ≤ 20 kN B) 10 ≤ P ≤ 20 kN C) P ≥ 10 kN D) P ≥ 20 kN