Answer: C) The lawyer was deceptively honest with his clients.
Explanation: an oxymoron is a figure of speech that consists in putting together terms that are apparently contradictory. From the given options, the sentence that contains an example of an oxymoron is the corresponding to option C, because the term "deceptively" means making you believe something that is not true and "honest" means truthful and sincere, so those two terms are contradictory.
Answer:
C.
The lawyer was deceptively honest with his clients.
Explanation: