Write a C program that does the following:

Asks the user to indicate the course they are enrolled in by inputting a single letter: $\text{'}$C$\text{'}$ or $\text{'}$c$\text{'}$ for COMP$500,$ and $\text{'}$E$\text{'}$ or $\text{'}$e$\text{'}$ for ENSE$501.$

If the user input matches one of these options, print a message stating the course they are enrolled in$.$

If the user input does not match any of the valid options, print an error message indicating that the response was invalid.

Adhere to good programming standards, including proper use of whitespace, naming conventions, and comments. Test your program with a variety of inputs to ensure that it is robust and produces the expected output.

For example:

Input Result

c

Which course are you enrolled in$,$ COMP$500($C$)$ or ENSE$501($E$)?$

The user is enrolled in COMP$500$