In what five ways is diplomacy important to the development of Nigeria?

As a non-aligned state, Nigeria attended the second meeting of the non-Aligned Movement that took place in Cairo, Egypt in 

The fundamental objective guiding a nation's foreign policy is 

The most effective instrument adopted by Nigeria against the East-West Cold War in the 1960s was

What encompasses a range of diplomatic, political, economic and security decisions and actions that a state embarks on to protect and promote sovereignty on the global stage?