(A) Barack Obama Sr.
(B) ** Ann Dunham
(C) Michelle Obama
(D) A potato flew around my room before you came.
EXPLANATIONS BELOW
Concept note-1: -Stanley Ann Dunham (November 29, 1942 – November 7, 1995), the mother of Barack Obama, the 44th President of the United States, was an American anthropologist. She was later known as, Ann Dunham, Ann Obama, Ann Soetoro, Ann Sutoro (after her second divorce) and finally as Ann Dunham.