According to the professor’s philosophy, the antidote to envy is one’s own work, always one’s own work: not thinking about it, not assessing it, but simply doing it.

(A) one’s own work, always one’s own work: not thinking about it, not assessing it, but simply doing it

(B) always work; because you don’t think about it or assess it, you just do it

(C) always one’s own work: not thinking about or assessing it, but simply to do it

(D) not to think or assess, but doing one’s own work（A）

(E) neither to think about one’s own work nor to assess it, it is always simply doing it

这题有点变态

答案怎么会是A呢？A选项是纯粹的英语口语，哪里有书面语严谨的味道？

请指教！