Possible answers:
(a). Sometimes sarcasm is so commonplace you won't even be aware. Sarcasm usually seems to appear in the middle of every sentence.
(b). A writer may use multiple letters to indicate an elongated syllable. In real life, if someone makes a statement you do not believe, you may respond by saying, " right, " but stretching out the word sarcastically.
(c). You may hear a tone of " of " every time the writer adds another word in a sentence, or condense all of the letters to make a statement of sarcasm. Pay attention to common sarcasm that people make.
(d). Look for the " stop " sign so the writer can restate the phrase and change the punctuation. You may notice other writing mistakes or things that the writer hasn't told you about.Choose from options above and answer: What most naturally follows?

How to detect sarcasm in writing 
See if the writer adds letters to common words. 
Sarcasm in writing can be difficult to detect in text due to the absence of verbal tone, which is often used to convey sarcasm when speaking. If someone is being sarcastic in writing, he or she may add multiple letters to common words to indicate a sarcastic tone.
Answer:
(b).