The journey around the world took the old sailor nine months, the sailing time was 226 days.
A. of which
B. during which
C. from which
D. for which
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(答案→)A. of which
B. during which
C. from which
D. for which
解析：本题考查介词与关系代词引导的定语从句。根据句子分析，定语从句的先行词是nine months,226天的航行时间是其中的一部分，属于从属关系，因此应使用介词of