The answer is <span>A. versatility</span>
Explanation:
It is a place where shares of pubic listed companies are traded. ... A stock exchange facilitates stock brokers to trade company stocks and other securities. A stock may be bought or sold only if it is listed on an exchange.
C. They study true movement of earthquake waves
I believe it would be 780 million km.
5.2 AU times 150 million km.
hope this helps
