单选题 Eventually Doctor Brown had to give up his experiments ______ nobody would understand him and support him financially.
A. for the reason of B. because the reason is
C. for the reason that D. because of the reason why

【正确答案】 C

【答案解析】[解析] 句子意思是：由于没人理解并资助他，布朗医生最终不得不放弃他的实验。because是连词，后面直接跟表示原因的状语从句；because of是介词，但若用because of，D中why应换为that才对；for the reason of后面加名词，但本句中是从句，故选C。