Answer:
<h2>D. 61% of the respondents were restaurant owners.</h2>
Step-by-step explanation:
If we read the problem, we can realize that the report is about eating out, about food, so the variables is towards that context. Among the options, D is the only one that relates to food, because it's about restaurant owners. Other options are not useful in this report, because they are about something else.
Basically, being Democrats, more than 6 feet tall or at certain age, all those variable are not relate with eating out. Therefore, the correct answer is D.