Final answer:
Speaking to an external group is challenging because it is harder to predict and interpret the audience's reactions.
Step-by-step explanation:
D. It is harder to predict and interpret the audience's reactions.
Speaking to an external group can be challenging because it is difficult to anticipate how the audience will react. Unlike speaking to a group of familiar listeners (option a), speaking to an external group means that you may not have established credibility with the audience yet (option c). Additionally, speaking to an external group may require more analysis and preparation (contrary to option b), as you need to consider the unknown factors and adapt your speech accordingly. When addressing an external group, the challenge lies in the unfamiliarity with the audience's dynamics, expectations, and responsiveness. Unlike speaking to an internal group (where option a may be applicable), external audiences may vary widely in terms of background, interests, and attitudes. This diversity makes it difficult to predict how the audience will react to the message. Effective communication involves not only delivering a message but also gauging and adapting to the audience's reactions. In an external setting, the speaker may lack the established rapport and understanding that comes with familiarity, making it more challenging to interpret cues, engage the audience, and ensure the message resonates effectively. Successful communication to an external group often requires heightened adaptability, sensitivity, and skill in navigating diverse audience responses.