Which link should you select to cancel an existing rental car reservation after making an error?

To cancel an existing rental car reservation after realizing an error, the appropriate action is to select the link that specifically indicates cancellation. Choosing the option that is labeled to cancel a rental car reservation directly addresses the action you wish to perform.

The link that states "Cancel Rental Car" clearly indicates its purpose: it is designed for the user who wishes to cancel a reservation outright. This option streamlines the process by providing a straightforward means to terminate the current reservation without any ambiguity.

In contrast, while modifying a reservation, editing a booking, or checking reservation status are processes relevant to managing a reservation, they do not fulfill the specific need for cancellation. These actions are more about adjusting details or confirming current bookings rather than annulment, which is why the specific cancellation link is the most appropriate choice.