Step 1: Understanding the Question:
The question asks to identify the qualities of good prose as described in the passage.
Step 2: Analyzing the Passage:
Let's evaluate each option based on the text:
\[\begin{array}{rl} \bullet & \text{(A) Use of bombastic words: The passage explicitly criticizes this, stating that a writer who uses "bombastic words... is obviously not going to make any impression." So, (A) is a characteristic of bad prose. } \\ \bullet & \text{(B) Matching the requirements of the targeted readership: The passage presents this as a key consideration for writers like journalists ("guided by the requirements of the public") and literary writers ("has a special audience in mind"). This is a characteristic of effective prose. } \\ \bullet & \text{(C) Ease of expression: The passage lists this directly as a positive quality: "Ease of expression is another criterion in this matter." } \\ \bullet & \text{(D) Economy of words: The passage praises this quality, mentioning that a critic uses "economical sentences, without any sense of wasted effort" and that good writing has a "sense of economy." } \\ \end{array}\]
The characteristics of good prose mentioned are (B), (C), and (D).
Step 3: Final Answer:
The correct option is (D), which includes (B), (C), and (D) only.