What was a major reason Constantinople fell to the Ottoman Turks in 1453?

A.
The city was weak after many years of constant attack.
B.
The city was betrayed after the army changed sides.
C.
The city was betrayed after its ruler accepted a bribe.
D.
The city was weak after suffering an outbreak of plague.

Answer: Fall of Constantinople, May 29, 1453, conquest of Constantinople by Sultan Mehmed II of the Ottoman Empire. The fall of the city removed what was once a powerful defense for Christian Europe against Muslim invasion, allowing for uninterrupted Ottoman expansion into eastern Europe.

Explanation: I looked it up.

Which Chinese thinker based his teachings on the idea that people should live in harmony with nature?

A) Confucius

B) Zheng He

C) Chiang Kai-shek

D) Laozi

Pls help!!! Urgent!

List two factors that pushed African Americans out of the South after Reconstruction and two factors that pulled the toward the
North.

The campaign biographies below are for two candidates running for seventh-grade class president.

Jacques Sportif is well known to students of Juan Ponce de Leon Middle School as a standout athlete. Although he moved to Centerville less than a year ago, he has already been named captain of the seventh-grade football and baseball teams. But there is more to Jacques than athletics! Jacques is a member of Ponce de Leon's Chess Club and recently placed third in a school-wide tournament. Jacques is surely one of the most popular students at Ponce de Leon. He will make a great seventh-grade class president. Vote for Jacques on Friday!
Abigail Addams has been active in student government since entering Juan Ponce de Leon Middle School at the beginning of sixth grade. She was elected to the sixth-grade Student Council at the beginning of last year and was chosen by the council to fill the vice president's spot when it became vacant halfway through the year. Abigail also served as chairperson of the committee that organized last year's very successful field day. She is liked and respected by all of her teachers and classmates. Abigail is clearly the best candidate for seventh-grade class president. Vote for Abigail on Friday!

Based on the information in the bios, why would Abigail most likely be considered more qualified than Jacques to serve as class president?

A.
Jacques needs to improve his chess skills.
B.
Abigail has more experience in student government.
C.
Abigail has been at the school for more than a year.
D.
Jacques is too busy playing two sports.