Hunt
The members of the Organization of Petroleum Exporting Countries usually comply with
their decisions, which are designed to maximize the long term profits of member nations.
A.their decisions, which are designed to maximize
B.its decisions, which are designed to maximize
C.their decisions that are designed for the maximization of
D.its decisions that are designed for the maximization of
E.its decisions, designed as they are to maximize
What would be the subject here members or the organization....
Here the pronoun after Organisation .... refers to the organisation itself which btw stands for OPEC, so the correct pronoun should be:
The members of the Organization of Petroleum Exporting Countries usually comply with
its decisions....
Cancelling options A and C. immediately.
E is seems awkward, so keep it aside.
Now remains B and D.
Look at the sentence and both options. the second part designed to maximize..etc etc is extra information.
D makes it sound as if the countries comply to only those decisions that maximize profits.
Does it seem so?
Leaving option B.
Finally
The members of the Organization of Petroleum Exporting Countries usually comply with
its decisions, which are designed to maximize the long term profits of member nations.