Final answer:
Math joined the curriculum of scholars in medieval times due to the influence of Arab scholars and the Islamic world. Arab mathematicians contributed to the development of algebra and trigonometry, while the decimal number system replaced Roman numerals. Hence the correct answer is option C
Step-by-step explanation:
In medieval times, math joined the curriculum of scholars due to the influence of various factors such as the Arab scholars and the Islamic world. Arab mathematicians made important contributions to knowledge and culture, leading to the development of algebra and trigonometry. Additionally, the introduction of the decimal positional number system, replacing Roman numerals, was influenced by Greek and Islamic influence.
Hence the correct answer is option C