The correct answer is B, Unearned Income.
As the name suggests, Unearned income is defined as an income which is not earned by doing work. This income is not generated by giving your performance or capabilities at some workplace. Rather this is an income which is earned just with the passage of time.
Like in this example, 10 shares of XYZ Computer Company was bought at the time of your birth for $200 and now they are of worth $500. It means with the passage of time, the value of the stock increases that generated a profit of $300. This is classified as unearned income.