Concept:A correctly structured sentence uses proper tense, clear subject, and logical sequence of events.
Explanation:The sentence must show that authorities acted before the storm hit. This requires the past perfect tense ("had taken") for the earlier action and simple past ("hit") for the later event.
Option A uses "had taken" before "the storm hit". This clearly shows the correct order.
Option B is unclear and wrongly makes the storm the subject facing steps.
Option C omits the timing relative to the storm.
Option D is passive and does not mention who took the steps, making it less precise.
Thus, only Option A has the correct subject, tense, and logical sequence.
Answer:Option A – "The authorities had taken the emergency steps before the storm hit."