Answer: The downward-sloping demand curves
Thaht is A because that is unnecessary
There are several people responsible for television advancements, such as Kenjiro Takayanagi. In 1924, he built the first all-electronic TV system in 1924.
Two years later, inventor John Logi Baird made the first demonstration of live television in London.
Alan Dower Blumlein patented the stereo system and worked on a high-definition TV system on the 30s.
After several years of development, the first transatlantic television signals were made in the 60s and changed people's lives forever.
Since then, TV viewers around the world have been able to see the world's news and events in a completely different way. They also found the most entertaining and popular electronic device of the 20th century.
Answer:
Below
Explanation:
Brazil had to defend itself from German submarines and other German attacks. Guatemala also had declared war on Germany and fought them.
