[单选题]Transitions like “therefore”, “due to”, and “as a result”, are expressions indicating ____________.rJB答案窝(daanwo.com)-大学生作业答案及考资分享平台 Atime sequencerJB答案窝(daanwo.com)-大学生作业答案及考资分享平台 Bcomparison and contrastrJB答案窝(daanwo.com)-大学生作业答案及考资分享平台 CclassificationrJB答案窝(daanwo.com)-大学生作业答案及考资分享平台 Dcause and effect