"Madeleine Albright: A Lifetime of Service" does not.
The MOST likely reason that "Madeleine Albright Biography" includes information about Albright's grandparents while "Madeleine Albright: A Lifetime of Service" does not is:
B. The biography focuses on her personal life, while "Madeleine Albright: A Lifetime of Service" focuses on Albright's contributions as a professional.
This option suggests that the different focuses of each text account for the differing levels of detail about her family background.