If the character starts and ends in the same place, the plot has gone in a circle. For example, if Charlie was having problems with his teacher at the beginning of the story, and the story talks about the many weeks he has tried to fix these problems, yet the story ends with him still not resolving these problems, the plot had gone in a circle. There is not resolution, no ending, no fix.
ANSWER
Two different species of mice migrated to the river from different directions.
EXPLANATION
Solved scientifically in my head.
"Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and the success of liberty." (A) contains a hyperbole.
In literature, a hyperbole is a stylistic exaggeration. It is used to give a dramatic effect to a statement.
Here, the hyperbole is: "pay any price, bear any burden, meet any hardship, support any friend, oppose any foe." There are of course prices that the U.S. are going to refuse to pay, burdens they will not afford to carry, etc., but by exaggerating these commitments, Kennedy sounds more resolute and more persuasive.
