Encouraged by my science teacher, I set about my studies on developing my product, I hope I will succeed in applying for a patent（专利）.
A. with whom
B. to whom
C. through which
D. for which
网友回答
A. with whom
B. to whom
C. through which
(答案→)D. for which
解析：考查定语从句：先行词是product，所以定语从句用介词+which，句意：被科学老师鼓励了，我开始开放产品的研究，我希望为此我可以成功的申请专利。选D。