It can be concluded from the first paragraph that ______. A. people need equal time of sleep B. sleep remains a puzzle C. sleep is among the processes of the nature D. everything aboutĐoạn văn57/87It can be concluded from the first paragraph that ______.people need equal time of sleep sleep remains a puzzle sleep is among the processes of the natureeverything about sleep has been brought to lightGiải thíchChọn B