A, B, and D begin statements that can stand by themselves logically. C begins a statement that shows how the previous statement and itself are connected. As such, the answer is C(As a result).
"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.
Nathan filled the knothole in the tree to prevent Boo from giving the children gifts. To trick the children, he told them the tree was sick and the knothole needed to be filled.
FRANCE
On September 1, 1715, four days before his 77th birthday, Louis XIV died of gangrene at Versailles. His reign had lasted 72 years, longer than that of any other known European monarch, and left an indelible mark on the culture, history and destiny of France. His 5-year-old grandson succeeded him as Louis XV
