The correct answer is B. Impromptu speeches require lots of research.
Step-by-step explanation:
A speech is a type of communicational situation in which one main speaker or speaker address to a group of people or audience in order to communicate a specific message. Additionally, speeches can be of many types this includes entertaining speeches that deal with no serious subjects; persuasive speeches that aim at convincing the audience; informational speeches that describe or provide information about something and impromptu speeches. In the case of impromptu speeches, these are speeches delivered with no preparation and therefore, they do not require lots of research or lots of rehearsal as they are delivered based on previous knowledge and in a spontaneous way. Therefore, the statement that is false is that impromptu speeches require lots of research considering these are spontaneous speeches rather than speeches previously prepared.