Based from the website https://www.skillsyouneed.com/ps/assertiveness.html Being assertive means being able to stand up for your own or other people's rights in a calm and positive way, without being either aggressive, or passively accepting wrong.
So to answer your question, no assertive communication does not mean to persuade others to agree with your point of view, it just means to stand up for what you or other people believe in.
Having a bmi of 35 is considered as a fat person. The answer to this question is letter b - Dominique has an increased risk of heart disease and diabetes. Dominique should try to lose weight and lower his BMI to imrpove his health.