Your 5'8"-Tall Grandfather Always Jokes That He Used to Be

Your 5'8"-tall grandfather always jokes that he used to be 6'2." All of the other males in your family average about 5'10" tall.Is he telling the truth about his original height? No,men lose height after 60,but is usually about ____.

A) 1.0"
B) 1.5"
C) 2.0"
D) 2.5"