SC（中国問題より１）

どなた下記のSCについて解説お願いします。


The expected rise in the price of oil could （be a serious impact to industrialized nations and severely diminish the possibility to have） an economy free of inflation.



(1)be a serious impact to industrialized nations and severely diminish the possibility to have

(2)seriously impact on industrialized nations and severely impede the possibility to have

(3)seriously impact on industrialized nations and severely impede the possibility of having

(4)have a serious impact on industrialized nations and severely impede the possibility to have

(5)have a serious impact on industrialized nations and severely diminish the possibility of having

正解は(5)でした。

問題を見たときに動詞の並列の問題と思い（3）を選択しました。なぜ（５）が回答なのかよくわかりません。すみませんが皆様ご指導よろしくお願いします。