[单选题]
In a Compton scattering experiment, what scatf 6xk e 79u(n9-bxksoitering abf ru):(*8cvy ( 8hmfdmq keb-ngle produces the greatest chadbch*mv:f -( q(8y)ferumbk8 nge in wavelength?
A. $0^{\circ}$
B. $90^{\circ}$
C. $180^{\circ}$
D. none of the given answers