Concept:Trace family relations step by step.Explanation:• A is B's sister ⇒A and B are siblings; A is female.• C is B's mother ⇒C is also A's mother.• D is C's father ⇒D is the father of A's mother C.• Therefore, A is the daughter of C, and D is the grandfather of A.• Thus, A is the granddaughter of D.Answer:Granddaughter