答案：A

句意：小时候，杰克在一所乡村学校读书，那所学校是以他祖父的名字命名的。本题考查非限制性定语从句。先行词是a village school，代入定语从句后为：The village school is named after his grandfather.由此可见先行词在定语从句中作主语，且该从句为非限制性定语从句，故用which引导。