18. In the American economic system, a. government plays a very limited , hands -off role . b. private enterprise and governmental participation coexist. c. there is no regulation of the free market. d. most businesses are owned by the government .

b. private enterprise and governmental participation coexist.

Explanation:

The American economic system is a mixed economic system which means that there are elements of both private enterprise and government participation.

There was a time when the U.S government played a limited role in the economy but as time went by and multiple failures were recorded in this system, the government stepped in to control the economy somewhat which led to both the private and public sectors having to coexist.

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

c. troops marched forward in close formation against newer, more accurate weapons