The correct answer is D. Defent itself
Explanation
The Treaty of San Francisco, which is also called the Treaty of Peace with Japan was signed in 1951 and its main purpose was to reestablish Japanese sovereignty and finish the second world war. Through this treaty Japan accepted not to have a defensive military force for international disputes, thus Japanese army aim is to preserve peace and safety in the country. In this way, Japanese military force can only be used to defend itself.
