Which is an example of social change in the 20th and 21st centuries? A. More people grow their own food.

B. People buy ready-made food at stores instead of cooking at home.

C. Values and norms have been less likely to change.

D. Jobs have become less specialized.

answer: c

explanation: i have done that passage before

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.

the answer is d. amendments.