The dowry system, money or property brought by a bride to her husband at marriage, was started centuries ago with the intention of providing security for a girl 16 difficulties and unexpected circumstances after marriage.
答案：(C) in case of
in case of 意為「以防、萬一發生…時」：嫁妝制度原是為了讓女子在婚後遇到困難或突發狀況時有所保障；due to（由於）、apart from（除…之外）、with reference to（關於）語意都不合。
答對率 36%。
四個選項都是幾個字合起來當一個介系詞用（劍橋 English Grammar Today 的 Prepositions 條目），中文翻起來都通順，只能靠語意的方向判斷。in case of ＝ 萬一發生…時，帶有「預先防範」的意味：In case of fire, use the stairs.（萬一失火，請走樓梯）。
空格前面是 providing security for a girl（為女子提供保障）——既然是「保障」，後面接的必然是「萬一遇到什麼狀況」，這兩個概念天生配成一對。「看到 security、protection、insurance 這類字，後面常接 in case of 或 against。」
due to 是「由於」，會變成「因為困難而提供保障」，因果顛倒——保障是預先給的，不是事後補的；apart from 是「除…之外」；with reference to 是「關於」。
in case of + 名詞（萬一發生…）；in case + 子句（以防…）：Take an umbrella in case it rains.（帶把傘以防下雨）。
in case of fire／emergency（萬一失火／發生緊急狀況）、in case + 子句（以防…）、provide security for（為…提供保障）、insure against（為…投保）。
In spite of modernization and the increasing role of women in all walks of life, the practice of the dowry in India is still widespread. The dowry system, money or property brought by a bride to her husband at marriage, was started centuries ago with the intention of providing security for a girl 16 difficulties and unexpected circumstances after marriage.
For this purpose, the parents gave 17 they could to their daughter, which consequently went to the groom's family. By the beginning of the 21st century, however, the custom had deteriorated to a point whereby the groom and his family had become very 18.
When demands for dowry are not met, the bride is 19 torture, and often even killed. The more educated a man is, the 20 is the expectation for dowry at the time of marriage. Girls who are highly educated are required to have larger dowries because they usually marry more educated men.