4. A certain substance, X, has a triple-point temperature of \( 20^\circ\text{C} \) at a pressure of 2.0 atm. Which one of the following statements cannot possibly be true? (A)X can exist as a liquid above \( 20^\circ\text{C} \). (B)X can exist as a solid above \( 20^\circ\text{C} \). (C)Liquid X can exist as a stable phase at \( 25^\circ\text{C} \), 1 atm. (D)Both liquid and solid X have the same vapor pressure at \( 20^\circ\text{C} \). (E)All of these statements could be true.