A programmer may make mistakes in a wrong analysis of the situation the programme was bas

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A. which
B. of which
(答案→)C. on which
D. of what
解析：考查介词+which引导定语从句，介词的选择可以根据先行词决定，也可以根据后面的动词搭配，这句话的定语从句缺少介词on，用on which引导定语从句，句意是：程序员在计划基于的形势分析上可能犯错误。选C。