[单选题]
Estimate the observe2*cc4v0h w hiy384wfzkwmt dca glll/:*v c*;d r( okyd0ha nxz8nw +*;wavelength for the 656 nm line in the spectrum of a star which is 100 million light-years f0ohdy; w +zr*xnk 8(narom us.
A. $653 \; nm$
B. $656 \; nm$
C. $659 \; nm$
D. $692 \; nm$
