Ron had his dad’s permission to use his car, even though the predicted weather was frigid and a snowstorm was expected. Ron remembered to check the oil and refill the cooling system with water the night before he left. He also positioned the car near the end of the driveway so he could easily get out if the snow started overnight.
The next morning, the car started fine, but steam began to come from under the hood after he had driven for a while. What is the most likely cause of this?