Adverb choice before "to blame": select the word that fits best Complete the sentence with the most natural intensifier: "He is the person who is ______ to blame." Choose the option that best collocates with "to blame".

Given data

• Sentence: "He is the person who is ______ to blame."
• We need the most idiomatic adverb/qualifier with "to blame".

Concept/Approach
Solely is the standard adverb meaning "exclusively" and pairs naturally with "to blame": "solely to blame".

Option analysis
solely — correct and idiomatic: "solely to blame." ✅only — can modify nouns ("the only person to blame") but is awkward in this slot.alone — usually follows the noun ("he alone is to blame"), not before "to blame".completely — changes the meaning to degree rather than exclusivity; less precise.

Final Answer
solely