The sum of the ages of 5 members comprising a family, 3 years ago was 80 years. The average age of the family today is the same at it was 3 years ago, because of an addition of a baby during the intervening period. How old is the baby?

• A. 6 months
• B. 1 year
• C. 2 years
• D. 2 years and 6 months