The correct answer is E. Focus groups allow for multiple viewpoints to be heard.
Explanation:
Focus group refers to a technique used in research to get information from participants, this technique implies creating small groups of people (from 5 to around 10 individuals) and then get information about their perspectives, opinions, and points of view in relation to some topic or product through questions and by allow participants to discuss. The use of focus groups has different drawbacks or disadvantages that include logistical and organization issues, less control over participants and a large amount of data. However, focus groups also have multiple advantages because they save time and money, they provide detail information and also allow diverse viewpoints which leads to interesting and complex data. Considering this, the one that is not a disadvantage of focus groups is that it allows for multiple viewpoints to be heard.