50 Why does the author consider Titanic’s tragic sinking an irony in the conclusion of the passage?
(A) The advertisements at that time boasted the unsinkability of the Titanic.
(B) The ship’s unsinkability was not really the center of attention before the accident.
(C) The rich passengers on the ship considered safety the top priority.
(D) The ship was believed to be sinkable only by some people at its time.