The answer is c. Hope this answe helps
Most famously he improved the telescope. He studied astronomy with his telescope.
Answer:
The African National Congress (ANC) was formed in South Africa on January 18, 1912, when a group of Africans, Colored, and Indians convened a meeting in Bloemfontein to create the South African Native National Congress. The name was officially changed to the African National Congress in 1923.
Explanation:
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Pope Urban II orders the First Crusades. On 27 November 1095, Pope Urban II makes perhaps the most influential speech of the Middle Ages, giving rise to the Crusades by calling all Christians in Europe to war against Muslims in order to reclaim the Holy Land, with a cry of "Deus volt!" or "God wills it!"