Adham Sayed, a Lebanese PhD student, chronicles Wuhan citizens’ life at the outbreak of COVID-19 in his book "Confidence Comes from Effectiveness: A Foreigner’s Wuhan Diary" . He remained in Wuhan during the city's lockdown and did things like: A. writing about his experiences online B. answering questions from people around the world C. broadcasting livestreamed videos D. giving interviews to various media E. working with the people of Wuhan