I'm guessing b but I'm not sure
It keeps u active and if u not active then u will get active
Based on the context in word the word "Lifestyle" is used in the statement, "A career will be most productive, comfortable, and enjoyable when it fits well into one’s lifestyle", the best definition of lifestyle would be option 3 -
a way of living that shows a person’s beliefs or opinions.
Seeing other people online that you may persevere as prettier than you or having a better body can have make you perceive yourself as ugly and not good enough.