Chọn phương án thích hợp với câu ban đầuCâu hỏiThey decided to go for a picnic though it was very cold. A. Because it was very cold, they decided to go for a picnic. B. However cold it was, they decided to go for a picnic. C. If it had been cold, they would not have gone for a picnic. D. It was very cold so they decided to go for a picnic.