Siroun Is Informed That Both of Her 1-Year-Old Twin Daughters

Multiple Choice

Siroun is informed that both of her 1-year-old twin daughters are of "normal" weight. She is then informed that one weighs 16 pounds and the other weighs 26 pounds. How is this possible?

A) One of the twins likely has Down syndrome.
B) The daughters were likely misweighed.
C) The "normal" weight range of 1-year-olds is very wide.
D) The initial "normal" information was incorrect.