I don't know what article you are referring to but a<span>t the outbreak of the Second World War, he was again appointed First Lord of the Admiralty. Following Neville Chamberlain's resignation in </span>May 1940<span>, Churchill became Prime Minister.</span>
Scenario 1: conflict- A civilization may attack another civilization for resources that they do not own.
Scenario 2: cooperation- Both sides trade for something each other wants.
This meant that some kind of relationship will arise inbetween civilizations, either as allies, or as bitter enemies
hope this helps
The answer is D, Jonas Edward Salk!