Psychologists observing a shopping mall parking lot found that, on average, drivers spent 39 seconds leaving a parking space when another car was quietly waiting to enter it, 51 seconds if the driver of the waiting car honked impatiently, but only 32 seconds leaving a space when no one was waiting. This suggests that drivers feel possessive of their parking spaces even when leaving them, and that this possessiveness increases in reaction to indications that another driver wants the space. Which one of the following, if true, most weakens the reasoning? ['The amount of time drivers spend entering a parking space is not noticeably affected by whether other drivers are waiting for them to do so, nor by whether those other drivers are honking impatiently.', 'Parking spaces in shopping mall parking lots are unrepresentative of parking spaces in general with respect to the likelihood that other cars will be waiting to enter them.', 'Almost any driver leaving a parking space will feel angry at another driver who honks impatiently, and this anger will influence the amount of time spent leaving the space.', 'The more pressure most drivers feel because others are waiting for them to perform maneuvers with their cars, the less quickly they are able to perform them.']