在考满分模考中做到一道题目，句子相当复杂，有点无法了解
Having no sense of moral obligation, Shipler was as little subject to the ___ of conscience after he acted as he was motivated by its ___ before he acted.
A. rewards
B. balm
C. reproaches
D. chastisement
E. promptings
F. atonement
答案：CD
想请问句中的was as little subject to the ___ 这句话该怎解读？