Answer:
Russell
Step-by-step explanation:
Russell does not seem to have any health problems like Winston and Bethany, and he plays sports as he only goes to the doctor when he has a sports injury, or for regular checkups. The fact that Russell exams regularly also proves that he's up to his health and cares about staying healthy. For this reason, we can confirm that Russell has life's most positive outlooks on Winston and Bethany.