The North Atlantic Treaty Organization has grown from 16 member states to

ALL BUT WHICH of the following are problems collective security approaches suffer from?

A. There is confusion about cause and effect between collective security and peace. B. States are not necessarily as committed to collective security as they say they are. C. It is often difficult for collective security allies to act quickly. D. Multilateral response may not always be the best approach in any situation. E. Even collective security alliance partners cannot always be trusted.

These sources are studies conducted by specialist historians who may have spent many years

studying a narrow topic. What are the sources called? A) books B) texts C) field notes D) secondary sources