Write a multi-choice question for the following article, with the given choices and answer: Article: A science fiction flying car looks like a normal car, but it is an aircraft that anybody can fly directly from any place to another without using roads or runways. Science fiction writers have written about flying cars for a long time. But now flying cars will soon fly out of the world of science fiction into our real world. And the dream of the science fiction writers will soon come true. The first-known sky car is the FSC-1. The FSC-1 looks like an expensive sports car. You can drive the FSC-1 on the road like a normal car. If you touch a button, its wings and propeller fold out and then it can take off, fly and land as an airplane. The owners of the FSC-1 can choose if they want to drive or fly. Another flying car or sky car is the Moller Skycar M400. Although you can't drive it on the roads, it is small and easy to fly and can take off and land like a helicopter . Urban Aeronautics' X-Hawk is another type of sky car. It is expected to be available for about $3 million. Just like any new technology, flying cars have taken a long time to be developed. But some experts think the technology is far from what people imagine when they are sitting in traffic. It still needs to be improved. Options: A normal B traditional C not good enough D strange Answer: C not good enough Question:
Some experts think the technology of flying cars is _ .