what are affine transformations?

A)  addition of bias term (+1) which results in arbitrary rotation, scaling, translation of input pattern
B)  addition of bias term (-1) or (+1) which results in arbitrary rotation, scaling, translation of input pattern
C)  addition of bias term (-1) which results in arbitrary rotation, scaling, translation of input pattern
D)  none of the above

Correct Answer :   addition of bias term (-1) which results in arbitrary rotation, scaling, translation of input pattern