What is the correct way to write the sentence below?

It's important to remember that when you are running late to his or her place of employment that you have the foresight to call ahead and let your employer know the situation.
A.
It's important to remember that when one is running late to his or her place of employment that he or she have the foresight to call ahead and let your employer know the situation.
B.
It's important to remember that when one is running late to their place of employment that they have the foresight to call ahead and let their employer know the situation.
C.
It's important to remember that when someone is running late to his or her place of employment that he or she have the foresight to call ahead and let their employer know the situation.
D.
It's important to remember that when you are running late to your place of employment that you have the foresight to call ahead and let your employer know the situation.