Concept:Mass teaching method is used by agricultural extension officers to send the same message to a very large audience across different areas at the same time.
Explanation:This method relies on radio, television, newspapers, and posters to spread information.
It is not limited to farmers living in one village or locality.
Instead, it reaches many people who are located far apart from one another.
Immediate feedback from the audience is usually not possible because the communication is mostly one-way.
It also does not involve practical demonstration, which is a feature of other methods like the result demonstration.
Therefore, the main characteristic is that information can be directed to a large number of people in different places.
This matches option A.
Answer:A. information can be directed to a large number of people at different locations