[单选题]
In a Compton scattering experiment, what scatters ukn (rrl3m;wam1e)8,atll7ing angle +bmhappxquc c3.mf*7*,1 uyyproduces the greatest cp1yuuc+fq3.,x *my7a p hmb* change in wavelength?
A. $0^{\circ}$
B. $90^{\circ}$
C. $180^{\circ}$
D. none of the given answers