________ he wrote scores of books about the life of poor people and they were great success.
A.In 1980'sB.During the 1980sC.For the 1980D.In the days he was in prison在线课程B
解析：
在表示“八十年代”时用in/during the 1980s/1980's，注意加定冠词the，年代用复数形式；
表示“在……的日子里”用in the days of…或in the days when，比如“在有电视的时代”，in the days of television或in the days when there was television.