The primary way in which the Hundred Years’ War changed warfare in Europe is that it was the first "total" war, in the sense that all resources were mobilized to fight.
During 1200 to 1450, Timbuktu had the largest library in the world and it held hundreds of thousands of books. Their library brought them great wealth and prosperity. However, after Chris Columbus and his Spanish explorers discovered the Americas and eventually started the Columbian Exchange, Africans were greatly disadvantaged. The Europeans captured millions of West Africans and transported them to the Americas as slaves. Timbuktu was located in West Africa. Their library is their biggest token of wealth after all the horror all the enslaved West Africans went through.
I would say A and B are correct.
Holy Fairs: The Kumbh Mela (the "pitcher festival") is one of the holiest of Hindu pilgrimages that is held four times every twelve years; the location is rotated among the four cities of Prayagraj, Haridwar, Nashik, and Ujjain. Shravani Mela of Deoghar and Pitrapaksha Mela of Gaya are also notable holy fairs.