Answer:
- This narrative, popularized by best-selling author Malcolm Gladwell, exemplifies his and others' critique of
Explanation:
The above mentioned version of the underlined text i.e. beginning with 'this narrative, popularized by best-selling author Malcolm Gladwell...critique of' best accomplishes the purpose of introducing Malcolm's point of view on the focus groups which would assist in amalgamating the author's point with Galdwell's perspective to enhance the efficacy of the message. The additional information inside the commas('popularized by Malcolm Gladwell') enhances the efficacy, credibility, clarity, and impact of the message.