Answer:
c. By using a pedigree.
Step-by-step explanation:
Albinism is a disease where an individual's hair, skin and eyes have very less color or no color at all. It is a rare genetic disorder. It is characterized by very little melanin production or no melanin production. People with albinism is prone to suffer from skin cancer.
Pedigree is defined as a line of descent of a family. It is the family tree of an individual. By following the family lineage or the pedigree of a person's family, a pregnant woman can be determined whether her child could be born with albinism or not.
Thus the answer is ---
c. By using a pedigree.