Running the report can display different results depending on the ________ that were entered

The library in TR1 is based on a Boost library.

a. Regex b. Unordered Associative Containers c. Date d. all of the above

When used with ofstream objects, operator! is not:

a. Overloaded. b. Used to determine if the open operation succeeded. c. Used to close a file explicitly. d. Used to return a nonzero value if an error occurs.