A、He first speech on TV. B、He invented the TV set. C、He was the first person appearing on TV. D、He gave the first demonstration

The first step toward the invention of television was taken in 1873. The person responsible for developing it was John Logic Baird. In 1926 [30] he gave the first demonstration of a television picture.
   As a home entertainment, [29] television rapidly became more popular than any other form. A news broadcast became more immediate when people could actually see the scene in question and the movements of the figures. Films could be viewed in the comfort of the home and variety shows were also available. Though much of the entertainment was of a popular kind like quiz competitions,  some remarkable cultural programs were also shown.  The publicity given to the actors and actresses on the screen meant that [31] a group of personalities became familiar in every household. One of the most popular programmers was the televised coverage of sport. And one interesting result of the television broadcast was the increased attendance at the actual events.