Both the oil experts advice that inventory of heating oil

Answer should be clearly C. But still the OA has not been provided, I request experts to confirm the OA.

Both the oil expert’s advice that inventory of heating oil should be marked up to meet an impending severe winter as well as the speculation that a major unit might close for a long time due to a major accident, caused heating oil prices surge to record levels last week in the world oil markets

(A) that inventory of heating oil should be marked up to meet an impending severe winter as well as the speculation that a major unit might close for a long time due to a major accident, caused heating oil prices surge to record levels last week

(B) that the inventory of heating oil should be marked up to meet an impending severe winter along with the speculation that a major unit may close for a long time due to a major accident, caused heating oil prices surge to record levels last week incorrect idiom both?

© that the inventory of heating oil be marked up to meet an impending severe winter and the speculation that a major unit might close for a long time due to a major accident, caused heating oil prices surge to record levels last week


(D) that the government mark up the inventory of heating oil to meet an impending severe winter as well as the speculation o a major unit probably closing for a long time due to a major accident, caused heating oil prices surge to record levels last week

(E) to mark up the inventory of heating oil to meet an impending severe winter and the speculation that a major unit may probably close for a long time due to a major accident, caused heating oil prices surge to record levels last week

We need both a and b. only C and E are left. Note that in E 2nd subjunctive case with speculated that clause has redundancy error of may probably be which is redundant and is wrong.

So Answer is C.

Experts, shouldn't 'advice' in subjunctive from be used with a 'to' ?

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Isn't the usage 'may probably' redundant in choice E? Experts please advice.

There are four errors in C:

1. "Due to" is used wrongly - should be "because of".
2. "Advice" does not take subjunctive - it takes infinitive.
3. Moreover for a command subjunctive, active voice is preferred because the advice/ demand is applicable on the subject of the action.
I demand that you pick up the phone.... correct
I demand that the phone be picked up.... not preferred
Thus in C, "...advice that the inventory be marked up..." in not preferred.
4. The advice to mark up is not to meet the speculation, but to meet the problem itself. Wrong meaning is conveyed by the construction "meet a sever winter and the speculation".

E in my opinion is the best of the lot, though it contains the errors 1 and 4 mentioned above.