It should be said from the start that, at the first glance, the concept of foreign policy might seem to be elusive. Even though it is a central concept of the discipline of International Relations, at times one can feel to be stranded in the same paradox that St. Augustinus of Hippo (AD 354 – Ad 430) has so eloquently described in his conception of time; “If no one asks me, I know what it is.” Indeed, there exists a     multiplicity of definitions, and a consensual definition of foreign policy is somewhat lacking in the literature on the subject. The tools and frameworks utilized in the execution of foreign policy evolve in time. As a result foreign policy is affected by the transformation of the domestic and international contexts. Therefore, the modalities and   practices covered by the concept itself remain in a state of“constant mutation”. 

As can be understood from the information given the statements which take place in the options II, III and IV can be used to affirm the argument that defines foreign policy as in a state of mutation, so the correct answer is D. The statement which takes place in the option I defines the scope of foreign policy.