Answer: A. Bamboo, shells, bones, and wood
Explanation: Before its invention, bones, tortoise shells, and bamboo slips were all used as writing surfaces, but as Chinese Hemp fiber and silk were used to make paper but the quality was far from satisfactory. Books at that time were made of wood or bamboo slips so they were heavy and occupied a lot of space.
<span>B. Population growth diminishes resources and increases poverty
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The answer is a good government run by the people.
A few major inventions that were invented after World War II were the following:
- Computers. These were invented in 1971 by Ed Roberts.
- Medical penicillin. This was invented in 1941 by a group of medical professionals.
- Jet engines. In the closing months of the war, jet engines came to the force. The first technology was developed in 1939 to 1945, and is now used all over the globe.