Which type of random sample do journalists use to elicit ideas and points of views from people on the street?

Over the years 1981-2000, 4,770 nonfinancial firms exited the U.S. markets for publicly traded equity. Which of the following was the most frequent reason for a firm's exit?

a. Merger or acquisition b. Bankruptcy or liquidation c. The firm reverted to private equity ownership d. The firm changed its listing to a foreign stock exchange

The database application is responsible for concurrency control

Indicate whether the statement is true or false