B
1) Considering that the rule for a 180º rotation CW is
Pre Image ---------------------Image
(x,y) ---------------------------- (y, -x)
2) Examining the graph
A(4,4) ------------------------> A' (-4, 4)
B(2,1) -------------------------> B' (1, -2)
C (6,1) ------------------------> C' (1,-6)
3) Hence the answer is A' (-4, 4), B' (1, -2), C' (1,-6)