Greg and Patricia learned the following rule in math class.

A rational number can be written as a decimal with one or more digits after the decimal point that eventually repeat.

Greg believes that 6 is a rational number, while Patricia believes that it is not. Who is right, and why?

Greg is right, because 6 can be written as a decimal with repeating zeros after the decimal point.

Greg is right, because 6 is an exception to the given rule.

Patricia is right, because 6 cannot be written as a decimal.

Patricia is right, because the repeating digit(s) after the decimal point cannot be 0.