Which Statement Best Describes the Relationship Between a Crossmatch and a Compatibility

Multiple Choice

Which statement best describes the relationship between a crossmatch and a compatibility test?

A) They are identical.
B) If a compatibility test were a pie, a crossmatch would be a slice.
C) If a crossmatch were a house, a compatibility test would be a room.
D) A crossmatch is a confirmation of the compatibility test.