Explain the logic behind john foster dulles concept of brinkmanship

Explain the logic behind John Foster Dulles' concept of brinkmanship. Dulles defined his policy of brinkmanship as "The ability to get to the verge without getting into the war is the necessary art." It was Dulles' policy that the United States should curb Soviet expansion with the threat of massive atomic retaliation.

I hope this helps you.

i think its c or d, its been awhile since i read this book