Chọn đáp án thích hợp sao cho có ý nghĩa như câu ban đầuCâu hỏi Slippery as the roads were, they managed to complete the race. A. The roads were so slippery that they could hardly complete the race. B. The roads were slippery but they managed to complete the race. C. The roads were slippery so they could hardly complete the race. D. The roads were so slippery; therefore, they could hardly complete the race.