There are several ways marketers can find relevant online information on competitors' products and weaknesses, summary comments, and overall performance rating of a product, service, or supplier. ________ is(are) a type of site that is concentrated in financial services and high-tech products that require professional knowledge.
a. Independent customer goods and service reviews
b. Distributor or sales agent feedback sites
c. Combo sites offering customer reviews and expert opinions
d. Customer complaint sites
e. Shopping bot service sites
Answer: c