Which of these contains the most authoritative data on diet and weight loss?

A.) A university study

B.) A low-calorie cookbook

C.) A fitness training blog

D.) A magazine survey

The correct answer is A. A university study

The study conducted by a university would be the most authoritative one because it would be conducted by scientists, while the remaining items might vary based on different conditions.

The question ask to choose among the following choices the best answer that contains the most authoritative data on diet and weigh loss and the best answer among the following is in letter A. A university study. I hope you are satisfied with my answer and feel free to ask for more