Final answer:
Without specific data correlating physician counseling to the adoption of healthy eating practices by adults with obesity, a precise percentage cannot be determined. Studies imply that long-term adoption of dietary changes is difficult, and a low percentage maintain such changes.
Step-by-step explanation:
The percentage of adults with obesity who adopted healthy eating practices after being counseled by their physicians cannot be precisely determined from the information provided. However, various studies and reports have suggested that long-term success in diet and lifestyle changes is challenging.
Many obese individuals attempt to lose weight through dieting, but success rates vary, and long-term maintenance of weight loss is difficult. According to some sources, 80 to 90 percent of individuals who lose weight through dieting may regain it, indicating that only a small percentage successfully adopt long-term changes such as healthy eating practices.
This suggests that the correct answer could be among the lower percentages provided, but without specific data correlating physician counseling to healthy eating adoption rates, it would be speculative to select a definite choice from options A, B, C, or D.