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.
To demonstrate responsibility, the character must show initiative to do things that aren't necessarily just for fun or for your own benefit, such as helping a charity or cleaning a the house. The character will be able to look after others and show real selflessness.
The answer is c it is obvious !!!!
Explanation
7 isnt an option? i guess go for 6 hope this helped :)