Local variables can begin with which of the following characters?

What does the following line do?

Do Until inputFile.EndOfStream a. Checks to see if the file exists b. Checks to see if the next input is –1 c. Checks to see if the file is empty d. Checks to see if all the data in the file has been read

A(n) ______ system is a set of hardware, software, data, people, and procedures that work together.

A. information B. communications C. business D. proficiency