[单选题]
A fast spaceship is traveling with3zz/ ix6i 5 .hfp+nz+n(vmnmh a speed of 0.80c. How fast woulxyw rsknr+9 l:+6w0 txd light travel fx+r9ws: t +x6rwl0yknrom the headlights of the ship relative to a stationary observer?
A. $0.20 \; c$
B. $0.80 \; c$
C. $1.0 \; c$
D. $1.8 \; c$
