safety of the vehicles. the automakers of the cars that performed poorly tell cnn their vehicles exceed federal requirements but some, like nissan and vw, say they will review the results of the crash testing. kate? chris? >> important to review the results and particularly important because this is a really fast growing market, small cars in this country, right? >> absolutely. they are very popular, and i asked the folks there with this highway safety group how do you decide which cars are you going to test, that you're going to test and they say we look at the cars that are selling the most so all of those cars that you saw in the piece extremely popular among on cuonsumers. >> thanks so much, rene. >> one of the reasons they're popular and one of the reasons that big cars and suvs remain popular. especially when you're putting your family in the vehicle you want to know you're going to