Whatistheauthor'spurposetowritethisessay?

题目：日记笔Whatistheauthor'spurposetowritethisessay?：

A、Tosavethepooranimalsfrommedicalrsearch.

B、Tohelpthesickchilderen.

C、Toachievehigherstatusinmedicalacademia.

D、Toargueforhisrightfulnessofconductinganimalresearch.

参考答案：D