Based on the scenario in the question, Dolores can be best described as an opinion leader. (Option A)
Opinion leaders refer to individuals with a significant amount of social influence within their network and who can influence the opinions of connected individuals. Within groups these individuals generally serve as the hub of an interpersonal communications network. As they are considered credible the opinions and behaviors of these individuals are respected and they are considered as role models. In the given case, as Dolores has information on the best services in the city and is well connected to the community, she is considered an opinion leader.
Note: The question is missing options which are a) an opinion leader b) an associate c) an aspirant d) a market maven e) a dissociate.
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