which of the following is the worst example of using a Boolean flag? (In other words, which one is least appropriate?)

Asking the user for a password that has to have at least one uppercase letter, at least one lowercase letter, and must not end in a number

Checking a student's grade, where if they entered prior to Fall 2016 they have to get at least a C, but if they entered in Fall 2016 or later they have to get at least a B

Asking the user for a number than has to be positive (above zero) and even

Checking whether to take a trip based on the day's temperature being between 70 and 85, there being no rain or snow, and having a car available