The option that most effectively completes the sentence is “allowing world nations freedom of choice, within reason, promotes peace”. According to John Kennedy in his speech delivered at the American University, nations (in this case he refers to the Soviet Union) should not try to impose rules on other nations as this interferes with the process of peace and creates tension.
It's between A and B but I find that B is the most logical answer
"Around the Corner" should be placed after "the sign reads 45 miles per hour" looking something like this, " The sign around the corner reads 45 miles per hour. "
