题目选项分析

The ice on the front windshield of the car had formed when moisture condensed during the night. The ice melted quickly after the car was warmed up the next morning because the defrosting vent, which blows on the front windshield, was turned on full force.

Which of the following, if true, most seriously jeopardizes the validity of the explanation for the speed with which the ice melted?

【选项】The warm air from the defrosting vent for the front windshield cools rapidly as it dissipates throughout the rest of the car.