RCA's Television Demonstration at the 1939 New York World's Fair

Multiple Choice

RCA's television demonstration at the 1939 New York World's Fair was significant because

A) it introduced regular transcontinental television broadcasting.
B) The FCC agreed to technical standards for commercial operations.
C) it demonstrated the current 525-lines-per-frame system of interlace scanning.
D) it proved that mechanical television produced the same quality picture as did electronic television.
E) it was the first demonstration of modern television to most Americans.