For this purpose, the parents gave 17 they could to their daughter, which consequently went to the groom's family.
答案：(C) whatever
whatever 引導名詞子句作 gave 的受詞，表示「父母把他們能給的一切都給了女兒」。whoever（無論是誰，指人）、whenever（無論何時）、whichever（無論哪一個，通常有限定範圍的選項）都不符合這裡泛指「所有能給的東西」的語意。
四個選項都是 wh- 加 -ever，長得一模一樣，你會憑中文挑一個。
先看空格在句子裡的位置：gave ______ they could to their daughter，動詞 gave 後面缺一個受詞，也就是給出去的東西，空格就是要填那個受詞。所以空格要的是一個自己帶著先行詞、整包當名詞用的複合關係詞。四個選項照語意分流：whoever 指人（等於 anyone who）、whenever 指時間、whichever 是在已經限定好的一組裡挑一個、whatever 指事物而且範圍開放（等於 anything that）。父母給出去的是東西，而且是「所有能給的」，範圍沒有限定，所以用 whatever。還原一次驗算：the parents gave anything that they could (give) to their daughter。順帶留意句尾 they could 後面的動詞被省略了，省掉的正是重複的 give，這與國中學過的 Do you like it?—Yes, I do. 是同一件事，重複的部分不必再說一次。
whoever 會讀成「父母把能給的人都給了女兒」；whenever 引導的是時間副詞子句，不能當 gave 的受詞；whichever 要求前面先限定好一組東西讓你挑，這一句沒有那一組。三個都是 wh- 加 -ever 的形態，形態吻合，容易被順手選走。
whatever 等於 anything that（無論什麼、任何……的東西）、whoever 等於 anyone who（無論是誰）、whichever（無論哪一個，範圍已限定）、the dowry system（嫁妝制度）、the groom's family（新郎家）、consequently（結果、因此）。
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.