Answer: B) Conduct a far-reaching milk advertising TV campaign with a catchy jingle and flashy images.
Step-by-step explanation: if we want to encourage or persuade an audience of doing something (in this case, purchasing more milk) we need to make sure that we reach as many people as possible, and, once we reach them, we also need to make sure that we made an impact in the audience. From the given options, the strategy that will reach the largest amount of people and that will make the biggest impact is to conduct a far-reaching milk advirtising TV campaign with a catchy jingle and flashy images.