If you look at all the answers, the second one is the only one that makes sense because it deals with land :)
Important progress was made, such as full development of the decimal place-value system to include decimal fractions, the first systematized study of algebra, and advances in geometry and trigonometry. Arabic works played an important role in the transmission of mathematics to Europe during the 10th to 12th centuries.
Sure hope this helps you :)
Financial problems and educational opportunities
To Pinard and the people who gathered around him the Berlin Wall had epitomized hostility and extreme separation between German families and friends due to the response of the Soviet Union to the Nazi invasion of their country, so when it was torn down this was a big relief to the German people who could once more be united after 40 years.
