The enforces laws to regulate the stock market.
A New York Stock Exchange
B. US State Department
C. Federal Bureau of Investigation
D. Securities and Exchange Commission

Explanation:

The SEC is responsible for enforcing securities laws, regulating the securities markets and related entities and working to ensure investors are treated fairly.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

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