Which leader was the first African American president at two different institutions for higher learning?
A. Booker T. Washington
B. W . E. B. Du Bois
C. John Hope
D. Alonzo Herndon

B. W . E. B. Du Bois

Explanation:

William Edward Burghardt Du Bois (1868-1963) was a prominent African-American writer and social scientist. He studied at Fisk University in Tennessee, and at Harvard University. He also wento to study a Ph.D. at the University of Berlin, which he did not finish, but he later got one from Harvard.

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.