[单选题]
A fast spaceship is travelib+lx g88+,awy i qzlizvb8w+,ng with a speed of 0ut9mq- z pce-4.80c. How fast would light travel from the headlights of the ship re-z mte9u4pc- qlative to a stationary observer?
A. $0.20 \; c$
B. $0.80 \; c$
C. $1.0 \; c$
D. $1.8 \; c$
