[单选题]
When a distant source emits light of a particular wavelength in the vis5bdelm* xz: (-go-oqb ible3ymz6 s70cekn d4)jtx, and the 04e 3 )dskcx6z 7mntjysource is moving away from us, the color of the light appears to us to be shifted toward the
A. red end of the visible spectrum.
B. blue end of the visible spectrum.