Encouraged by my science teacher,I set about my studies on d

Encouraged by my science teacher,I set about my studies on deleveloping my product ____I hope I
will succeed in applying for a parent
A with whom
B to whom
C through which
D for which 为什么选D啊,C难道不可以吗

选D.
句意：在科学老师的鼓励,我开始了开发自主产品的研究项目.我希望我能够成功地为我的产品申请专利.
专利应为patent.
选C不符合英语表达习惯.through是通过某种方式,方法=by way of / by means of,此处用through逻辑不通.
我们学英语就是学习这门语言的恰当表达方式,千万不要从中文角度去断定英文表达.

我好好复习下