SPOT THE ERROR:The roof of the house collapsed due to heavy snowfall: lucky no one was at home when the incident occurred.

Explanation

Analysis: The word "lucky" is used incorrectly here. It should be "luckily," which is the adverb form that correctly modifies the clause following it ("no one was at home").Conclusion: This option contains the error.Lucky: This option is the correct one to mark, as "lucky" is incorrectly used. The correct word should be "luckily," which is the adverb form that should modify the clause.Explanation:"Due to" is correctly used to indicate the cause of the roof collapse."Lucky" is incorrect; "luckily" is the correct adverb form to modify the following clause."Was" is correctly used as the past tense of "is.""Occurred" is correctly used as the past tense of "occur."So, the correct answer is B) Lucky.