[題目] 想請教一題有關which 跟where

This is the basement, ____ can accommodate a family of up to ten persons.
(A) which
(B) where
(C) in where
(D) in that

疑問：為甚麼是A而不是B

我想說Where = In which ，但這題沒有in所以我選了where。想請大神們幫解惑，感謝。-----
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