Opponents of the proposed water desalination plant cite the

We must take deep look at the options one after the other in order to take the right decision in choosing the options.

Option A - Incorrect
The statement here is not what we intended getting contextually and grammatically. It is still the same as in the question being asked in the original content.

Option B - Incorrect
The preposition "to" means it is what's exactly been expected to happen. i.e futuristic tense in the manner the verb "be" has been used in the sentence

Option C - Incorrect
We do have different scenario here, the statement has a different meaning. it appears like a negative sentence formation which isn't an exact categorisation of the many reasons why there was approval.

Option D - Incorrect
It appeared as if this occured in a conversation or dialogue perse. It seeks to show that an explanation is being given from a personal point of view.

Option E - correct
This follows the option KISS study formulae which stands for "keep it short and simple". It shows conciseness, aptness, and very brief.