All members agreed to treat an attack on one as an attack on all
Explanation:
The treaty which was a treaty that helped to unite the united states of America with other Western countries with the aim of protecting each other collectively. against rising forces and against communism which was practiced in the soviet Union.
The North Atlantic treaty which is also known as the Washington Treaty was signed in 1949 in Washington D.C after the world war 2 has ended. the main purpose was to avoid the rising of communist attacks on member countries that are part of the treaty.it protected each other an attack on one was considered an attack on all .
"<span>All members agreed to treat an attack on one as an attack on all" is the best option from the list, since this was a treaty formed by mostly western democratic nations that were afraid of the spread of communism. </span>
