In the code, A × B means A is the mother of B, A ÷ B means A is the daughter of B, and A - B means A is the son of B. If D ÷ C - A = true, what is the relationship of D to A?
Answer: A. D is A's mother
D is the daughter of C (D ÷ C) and C is the son of A (C - A), making D the mother of A.