The four estates of France were; Clergy, nobles, middle-class, and peasants
Explanation:
The estate of the clergy was made of wealthy people who were not paying taxes in the 1780s the population was about 130,000. The second estate was made of small groups who were also exempted from tax payment and other military duties. People with noble blood were considered under this category.
The three estates were made of ordinary people in France who operated the feudal government. They owned lands and wealth and they were the largest in number. They, therefore, had to pay taxes for funding the clergy, and they were left with no food.
The Zimmerman Telegram was a message from Germany to Mexico where Germany tried to make an alliance with Mexico in case the U.S joined the war. Germany said that they would let Mexico have their old territory back, which included Texas.
I think it was <span> over who would control appointments of church officials, a conflict which is sometimes called the Investiture Controversy. Hope this was useful :P</span>