So the output would be a sentence where each original word is replaced by three synonyms, each word's options within , separated by |.
But "which one" might be two words. Alternatively, maybe "that" → "it", but depends on context. Wait, "that" in the original sentence is a pronoun referring to the thing. So "that" can be replaced with "it", "which", or "such". So the output would be a sentence where
"can’t" → unable
Hmm, need to check if synonyms fit.