Official Explanation
If the clerk treats his office (a fancy way to say his job) with a general lack of respect, then he treats his clients with a similarly cool and distant manner, a manner of “casual nonchalance.” “Meticulous” (careful and precise) is positive and “envy” is not indicated by the sentence. As for the second blank, knowing that “grand farce” is a common English idiom is helpful but is not essential—the word “farce,” or mockery, is the only word that fits. A “grand gesture” would be positive (a “grand gesture” would be something like an elaborate marriage proposal, apology, etc.), and it is not possible to treat one’s entire job like a “grand tirade” (angry speech).
Answer: A,E