Two of the following statements are true, and one is false. Identify the false statement:

a$.$ A program comment is a message that is displayed on a screen to ask the user for a response and perhaps explain how that response should be formatted.

b$.$ It usually makes sense to give each variable a name that contains a noun and to give each module a name that contains a verb.

c$.$ Echoing input can help a user to confirm that a data item was entered correctly.