[单选题]
If a material has an index of refraction of5q(hnen*fyvn l zc8 :3(ot 2fq 1.50, what is tay ,wawn*b 8oi5 cxx-,r:6 izyhe speed of light through5wz b *8:wiiy xaor x,y-nc6a, it?
A. $2.00 \times 10^{8} \; m/s$
B. $3.00 \times 10^{8} \; m/s$
C. $4.50 \times 10^{8} \; m/s$
D. $6.00 \times 10^{8} \; m/s$
