[单选题]
Estimate the observed wavckcwn;to yrx2h00esw 5d 89e4elength for t te 0-.rl34fdudxa tk5aoh c82he 656 nm line in the spectrum of a star whictl8u2 khrd -.afxoec 54t03a dh is 100 million light-years from us.
A. $653 \; nm$
B. $656 \; nm$
C. $659 \; nm$
D. $692 \; nm$
