Augustus' Greatest Achievement would be : The Pax Romana , which mean Roman Peace
Before augustus' Reign, The Roman empire was under a serious Crisis. A lot of Corruption happen in the country, incompetent government officials, a lot of wars between roman states, etc. During his reign, Augustus managed to solve all of this problem, creating a Glorified prime era for Rome. This is why he's considered as one of the best Roman emperor in the history
For the US you have: Harry Truman, Ronald Reagan, and Dwight D. Eisenhower
for the USSR you have: Joseph Stalin, Mikhail Gorbachev, and Nikita Khrushchev
for Cuba was Fidel Castro
I hope this helped
September 1781 - October 19, 1781. The battle of Yorktown<span> began late in September 1781. The British General sent pleas for troop reinforcements and even considered ferrying his men across the river to safety. The French and Americans began a long bombardment, with the French artillery proving highly accurate.
</span>The Siege of Yorktown<span>, also known as the </span>Battle of Yorktown, the Surrender at Yorktown<span>, German </span>Battle<span> or the </span>Siege of Little York, ending on October 19, 1781, Yorktown<span>, Virginia, was a decisive victory by a combined force of American Continental Army troops led by General George Washington and French Army troops led.</span>
I believe that the answer is D, because they used a lot of libraries because of scholars.