actually it is D. some people to work for economic and social reform.
Explanation:
Islamic mathematicians such as Al-Khwarizmi, Avicenna and Jamshīd al-Kāshī made advances in algebra, trigonometry, geometry and Arabic numerals. Islamic doctors described diseases like smallpox and measles, and challenged classical Greek medical theory.
Google because they put their ads up first so you click on them more often