20. 近年來日本和南韓兩國關係惡化，主要是因為日本前首相小泉純一郎屢次參拜有爭議性的靖國神社。
(A) Relations between Japan and South Korea have deteriorated in recent years, mainly because of former Japanese Prime Minister Junichiro Koizumi's repeated visits to the controversial Yasukuni Shrine.
(B) Japan-South Korea relationships have worsened during the past few years, chiefly owing to the several visits paid by former Japanese Prime Minister Junichiro Koizumi to an esteemed war shrine, the Yasukuni Shrine.
(C) The bilateral relations between Japan and South Korea have ameliorated in recent years, mainly resulting in former Japanese Prime Minister Junichiro Koizumi's constant visits to the nostalgic Yasukuni Shrine.
(D) Former Japanese Prime Minister Junichiro Koizumi's infrequent visits to the notorious Yasukuni Shrine kindle the deteriorating relations between Japan and South Korea.