Question: The freezing point of nitrous oxide is -91°C. Which of the following statements best describes the effect on the particles in liquid nitrous oxide as its temperature is lowered to -91°C?

  Options: 
 A. The speed of the particles decreases.
 B. The particles begin to move in a straight line.
 C. The particles begin to move with a greater force.
 D. The motion of the particles becomes more random.
Answer: A