求教，新东方语法练习题1第13题，请各位大虾不吝赐教

nicklover

13．For all his professed disdain of such activities, Auden was an inveterate literary gossip.
（A）For all his professed disdain of such activities
（B）Having always professed disdain for such activities
（C）All such activities were，he professed disdained and
（D）Professing that all such activities were disdained
（E）In spite of professions of disdaining all such activities

我不明白后半句的意思， Auden was an inveterate literary gossip, 为什么最后答案是a？

谢谢~~~~

nicklover

呜呜,怎么没有人理我的呀~~~~~