请教prep 07 - 83

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83. (29013-!-item-!-188;#058&003802)

Stock levels for domestic crude oil are far lower than in past years, leaving domestic oil prices vulnerable to any hints of oil supplies being disrupted in the Middle East or to any unexpected consumer demand growth possibly prompted by colder-than-normal temperatures.

(A) leaving domestic oil prices vulnerable to any hints of oil supplies being disrupted in the Middle East or to any unexpected consumer demand growth possibly

(B) leaving domestic oil prices vulnerable to any hints of oil supply disruptions in the Middle East or any unexpected growth in consumer demand that might be

(C) leaving domestic oil prices vulnerable to any hints of oil supplies that are disrupted in the Middle East or to any unexpected growth in consumer demand as was possibly

(D) resulting in the fact that domestic oil prices are vulnerable to any hints of oil supplies being disrupted in the Middle East or to any unexpected consumer demand growth possibly

(E) resulting in the fact of domestic oil prices that are vulnerable to any hints of oil supply disruptions in the Middle East or to any unexpected growth in consumer demand that might be

问题：

请教一下，or连接的结构是否需要平行呢，比如这道题主干为: leaving oil prices vulnerable to oil suplies ... or (to) any unexpected growth in ....

to在这里能不能省略呢？

冰箱贴

并列结构vulnerable to any…or to any和vulnerable to any… or any表达都正确，两个to的功能一样，可以省略。不是说省略了to，结构就不平行了。