The correct answer is B because none of the other ones show people/ things bandwagoning
The correct answer is A. You can receive instant feedback from your audience.
This is something that cannot be done if you are writing a text and your audience reads it at their home - they cannot immediately let you know what they think about your ideas and arguments. However, if you are giving a speech in front of an audience, then they absolutely can. B, C, and D are examples of what happens during writing, rather than speaking.
It should be, "We'll teach you how to spell 'well'", not 'good'.
