Which of the following Rh factor combinations could cause agglutination of an infant's red blood cells?
A. Mother is Rh-, father is Rh+, infant is Rh+
B. Mother is Rh-, father is Rh+, infant is Rh-
C. Mother is Rh+, father is Rh-, infant is Rh+
D. Mother is Rh+, father is Rh+, infant is Rh-