[单选题]
00.01: As a wave moves 7 pxuk;sloo07 o/*xp ufrom one medium t4.w k;agxedcf+ , sxrdw 5rx48c w4-deo a second medium with a different index of refraction which of the f w+dwx4;ek48rdcg5 c wfsed4-.xa,r xollowing wave properties would NEVER change?
A. frequency
B. wavelength
C. speed
D. angle
E. all will change