Final answer:
To determine the hours Mrs. Wind took driving back to SF, we use the formula time = distance / speed. Given a distance of 40 km and a speed of 80 km/hr, the driving time is 0.5 hours or 30 minutes. There's no matching option provided in the context of the question.
Step-by-step explanation:
To determine how many hours Mrs. Wind took driving back to SF, we need information about the distance to SF and her speed. If we consider the last piece of provided information, where it says "you forgot to look at your watch to see what time the police got there. But you use a map to measure that the distance between the party and your house is 40 kilometers. And you also remember that you drove the whole trip at a steady speed of 80 kilometers/hour", we can calculate the time it took for that trip.
If Mrs. Wind drove a distance of 40 kilometers at a steady speed of 80 kilometers/hour, we can apply the formula time = distance / speed.
Time = 40 km / 80 km/hr = 0.5 hours
Since 0.5 hours is equivalent to 30 minutes, we need to find an answer option that is closest to this time frame. Looking at the options provided, none of them closely match 30 minutes. Therefore, there seems to be a discrepancy, or the necessary data to conclusively choose an option from (A) to (D) is missing or not related correctly in the context of the question provided.