Evaluate the extent to which the politics of newly formed postcolonial states after the end of empire changed between 1945 and 1975

The nationalism movement was captured by a new wave of dictatorial leadership  that led to numerous coups,instability and increased poverty of the populace.
only a few nations escaped coups and totalitarian regimes. The countries internal politics were rocked by rampant corruption,impunity and oppressive practices.

The best evaluation of how there were changes between 1945 and 1975 In postcolonial states is:

There were several violent power seizures known as coup d'etat.

After the end of the empire, there were several postcolonial states which were formed, but because they were weak and had no good structure, there were many violent power seizures.

With this in mind, we can see that the nationalism movement led to the birth of many dictators in the postcolonial states.

Read more about nationalism movement here:

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The correct answer is C. public safety