Because there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulated international disputes over uninhabited islands.

The correct answer for:

Because there are provisions of the new maritime code that provide that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they have already stimulated international disputes over uninhabited islands.

Is:

Because the new maritime code provides that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, it has already stimulated international disputes over uninhabited islands

Explanation:To understand this question we need to re-write it, re-structure it, and analyze it.

First of all, because there are provisions of the new maritime code that provide that ... is already wrong. So we have to correct it:

Because the new maritime code provides that even tiny islets can be the basis for claims to the fisheries and oil fields of large sea areas, they ...

We require to correct it because in this case, we are talking about a phenomenon. Not about the group of claims made over large sea areas.

Thus, we replace it with: "it has already stimulated international disputes over uninhabited islands." Because again we are talking about the phenomenon/event. Not the talks.

After our editing, the phrase conserves its message and also is specific. Unlike the initial phrase. Therefore the restructure is the correct answer.