Final answer:
The two important dimensions associated with credibility in selecting spokespeople for maximizing message influence are expertise and trustworthiness.
Step-by-step explanation:
The two important dimensions associated with credibility in selecting spokespeople for maximizing message influence are expertise and trustworthiness.
Expertise refers to the knowledge, skills, and experience that a person possesses in a particular field. Selecting a spokesperson who has expertise in the topic being discussed adds credibility to the message and makes the spokesperson more persuasive.
Trustworthiness, on the other hand, refers to the perceived level of honesty, integrity, and reliability of the spokesperson. A trustworthy spokesperson is more likely to be seen as credible and their message is more likely to be influential.