[单选题]
X-rays with a wavelength oc gq/e/c1x8fcf 0.00100 nm are scnggl6n+;6j h( 9qdht fattered by free electrons at 130e. What i ;j6nf9tl6h (ghngq+ds the kinetic energy of each recoil electron?
A. $2.5 \; MeV$
B. $5.0 \; MeV$
C. $7.5 \; MeV$
D. $10 \; MeV$