Read the passage and answer the following questions:
It was in Germany and France that the first successful attempts were made to produce an internal combustion engine drivers buy petrol. In England, people were strangely timid about horseless vehicles. English inventors were handicapped by a quaint old law which forbade any such vehicle to attain a greater speed than four miles an hour, and compelled each one to be preceded by a man carrying a red flag. This law was not repealed until 1896.
    The earliest motor cars were looked upon as mere jokes, or as rather dangerous playthings, by everyone except their inventors. Some of them were single-seaters, others would carry two or even three people; but all were noisy, clumsy, queer-looking things. When in 1888, Carl Benz, a Garman produced a three-wheeled, internal-combustion car, a great forward stride had been made. Another German, whose name, Daimler, is often seen on motor cars to this day, was experimenting about the same time and testing a petrol-drivers engine.
It is easy to understand how the introduction of the petrol-driven engine revolutionized road transport throughout the world. Until then, the necessary power to push a vehicle along could not be obtained without the cumbersome tanks and boilers and furnace of the steam engine. The internal combustion engine is light in weight and small in size by comparison; the fuel is burned in it, so that there is no waste, like the dusty cinders of a coal-fire.