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Explanation: Pope Gregory VII was able to make King Henry IV (the German emperor) abdicate the throne by means of an interdict.

Option (a-i) is incorrect, because Chengiz Khan was actually very tolerant of other religions. Many of his advisors were of different religions.

Option (b-ii) is incorrect, because the Seljuq Turks took over the city of Jerusalem, which resulted in the Crusades.

Option (c – ii, iii) is incorrect. Option (ii) is incorrect (explained above), and option (iii) is incorrect because the Crusades weakened the Seljuq Turks (whose later descendents formed the Ottoman Empire).