Step-by-step explanation:
According to programming best practices, "creditCardNumber" would be a good name for a variable that holds a credit card number.
Using descriptive names for variables makes code more readable and easier to understand. In this case, "creditCardNumber" clearly conveys the purpose of the variable and makes it easy for other developers to understand what it contains. It's important to use meaningful variable names in order to write clear, maintainable code.