According to Special Relativity, What Is the Speed of Light $0.40 \mathrm{c}$

According to special relativity, what is the speed of light measured in a spaceship traveling at $0.40 \mathrm{c}$ ?

A) $0.86 \mathrm{c}$
B) $0.60 \mathrm{c}$
C) $1.0 \mathrm{c}$
D) $1.4 \mathrm{c}$
E) None of these choices are correct.