单选题 Noting the murder victim's flaccid musculature and pear-like figure, she deduced that the unfortunate fellow had earned his living in some ______ occupation.

【正确答案】 D
【答案解析】sedentary久坐的，固定不动的。treacherous背叛的；不牢靠的。illegitimate非法的。ill-paying报酬低的。