Accoding to the old stories of Iceland and Norway,Eric the Red was forced to leave Iceland because he had mitted a murder, he got into trouble.
A.for which B,at which C.in which D.with which
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解析：本题考查定语从句。he get into trouble forwhich这里for 表示由于的意思，即由于这个原因他陷入了困境。故选A。