20.  Passage: First, water is heated. Then, it boils. Next, steam is produced. Finally, the steam cools and condenses.
Question: Which of the following statements accurately describes the sequence of events in the passage?
(a) Steam is produced before the water boils.
(b) Water is heated before it boils.
(c) Steam cools and condenses after it is produced.
(d) The process starts with the cooling and condensing of steam.