Question

which of the following defines a rotation around point Q of x
A. where q is the center, the image of Q itself, and for any other point V, QV'/QV = x
B. Where Q is the center, the image of Q itself and for any other point V, QV' = QV and m C. For any ^QXC, QQ' = XX' = CC', QX = Q'X', QC= Q'C', X'C', M D. WHere m is ta mirror line, if point Q is on the line x, then Q'=Q. If point Q is not on line x then x is the perpendicular bisector of QQ'.

Please help me i am so confused :( Please help me!!!