Read this excerpt from "Road to Valley Forge." General George Washington was given command of the newly formed Continental Army in June 1775. He inherited a diverse group of liberty-loving and independent-minded colonists. He faced the difficult task of transforming them into an army that would fight for a "common defense." The American army also had to match up with the British army, which consisted of professional soldiers.
Which of the following quotes from the same article best supports the main idea of the excerpt?

A. "Paul Revere secretly rode out of Boston."
B. "In the 18th century, the army left holding the battlefield after the loser had retreated was the victor."
C. "Precision marching and iron discipline marked the most successful armies. Great Britain had one of the best in the Europe."
D."The Americans took up fortified positions to defend against an expected British attack."