Final answer:
In 1945, the number of U.S. households with televisions was around 10,000, as TV was a new, luxury technology mostly accessible to the wealthy. Option b is the correct answer.
Step-by-step explanation:
In 1945, the number of U.S. households with televisions was extremely low, as the technology was still in its infancy and not widely available. During that time, only a select audience of the wealthy had access to television, making it a luxury rather than a common household item.
By 1950, there were just under 4 million households with a television set, which was approximately 9 percent of all U.S. households. Keeping this in mind, we can infer that the number of households with televisions in 1945 was even smaller. Therefore, the correct option in the final answer for the approximate number of U.S. households that had televisions in 1945 is B. 10,000.