The hell is the the questin
Answer: Assuming D refers to a physical attachment and not an expression, then A, the ISS' clear purple is to carry out research.
It depends.
Some people study history to learn about the past, others study history because it's interesting, and some study it to learn from past mistakes.
Answer:
By changing Constantinople to Istanbul
Explanation:
Mehmed ll put an end to the 1,000 year Byzantium rule over the extremely important city of Constantinople and changed the name to Istanbul. After Mehmed ll led a 53-day siege on Constantinople it finally came into Ottoman possession in 1453 and to this say is the largest city in Turkey.