STR Analysis Is Performed on Bone Marrow Donor-Recipient Pairs Prior

STR analysis is performed on bone marrow donor-recipient pairs prior to transplantation for which of the following reasons?

A) To determine whether the donor and recipient are a match
B) To determine the likelihood of graft-versus-host disease
C) To find informative alleles for post-transplantation studies
D) To add their STR haplotypes to a national database