(A) radio
(B) computer
(C) walkie talkie
(D) ** TV
EXPLANATIONS BELOW
Concept note-1: -Approximately 8, 000 U.S. households had television sets in 1946; 45.7 million had them by 1960.
Concept note-2: -Before 1947 the number of U.S. homes with television sets could be measured in the thousands. By the late 1990s, 98 percent of U.S. homes had at least one television set, and those sets were on for an average of more than seven hours a day.
Concept note-3: -September 26, 1960 is the day that changed part of the modern political landscape, when a Vice President and a Senator took part in the first nationally televised presidential debate. The Vice President was Richard M. Nixon and the U.S. Senator was John F.
Concept note-4: -There was only three channels available; ABC, CBS, and NBC.