Final answer:
The cause of Lisa and Megan's car spinning out of control is likely due to icy road conditions during an exceptionally cold winter.
Step-by-step explanation:
The question relates to the factors that might cause a car to spin out of control. Based on the provided information, the most likely reason for Lisa and Megan's car to spin out of control is icy road conditions. This assumes that the car was in an environment where the winter is exceptionally cold, leading to icy or slippery roads.
Engine failure, brake malfunction, and tire blowout are also potential causes for a car to lose control; however, with the given context that it is an exceptionally cold winter, the icy road condition becomes a more probable cause.