Due to the highly sensitive nature of the court proceedings, the jury has been sequestered to prevent the leaking of information to the press.
1 has been sequestered to prevent the leaking of information
2 have been sequestered to prevent the leaking of information
3 has been sequestered to prevent them from leaking information
4 have been sequestered in an attempt to prevent them from leaking information
5 has been sequestered to prevent the leaks of information from them
The OA is A.
I have 2 doubts about this question though:
1. The usage of due to, since due to can be replaced by "caused by", so the proper usage of "due to" is when it is connected to a result rather than a process:
i.e: The serious landslide is due to the month long rain season - Ok
Serious landslide is likely to occur, due to the month long rain season - Not Ok.
2. When we use to...the implied subject is the subject of the preceding clause:
I stopped them seeing each other to prevent further arguments (I want to prevent further arguments);
They are forbidden from seeing each other to prevent further arguments (wrong, they are not to prevent further arguments);
They are forbidden from seeing each other to prevent them having further arguments (ok, since them is used).
This principle is cited from Manhattan Guide, please correct me if I am wrong.
Thanks.