If Tom and Betty Are Typical Adults and Both Are

If Tom and Betty are typical adults and both are 6 feet tall at age 25, about how tall would you expect them to be at age 80?

A) Tom will remain at 6 feet, but Betty will be about 5 feet 10 inches tall.
B) Betty will remain at 6 feet, but Tom will be about 5 feet 10 inches tall.
C) Tom and Betty will both remain at 6 feet.
D) Tom and Betty will both be about 5 feet 10 inches tall.