What was considered potentially problematic as part of Channel 4's 2016 Rio Paralympics campaign?Group of answer choicesChoice of activities focused onSlogan of, 'Yes, I can'Diversity of impairments shown

The question seems to be incomplete as there is no specific question asked about Channel 4's 2016 Rio Paralympics campaign. However, I can provide some general information based on the given choices.

1. Choice of activities focused on: This could be problematic if the activities chosen did not accurately represent the range of sports in the Paralympics, or if they were chosen in a way that stereotyped or misrepresented the abilities of the athletes.

2. Slogan of, 'Yes, I can': This slogan could be seen as problematic if it was perceived as patronizing or oversimplifying the challenges faced by Paralympic athletes. It could also be criticized if it seemed to imply that success is simply a matter of willpower, ignoring the many external factors that can affect an individual's opportunities and achievements.

3. Diversity of impairments shown: This could be problematic if the campaign did not show a diverse range of impairments, potentially leading to a lack of representation for certain groups. Conversely, if the campaign focused too much on the athletes' impairments rather than their skills and achievements, this could also be criticized.

Without more specific information about the criticisms leveled at the campaign, it's hard to say which of these factors was considered the most problematic.