The RVR value represents _______ .

The RVR value represents _______ .

A.the slant range distance the pilot can see down the runway while crossing the threshold on glide slope

B.the horizontal distance a pilot should see down the runway from the approach end of the runway

C.the slant visual range a pilot should see down the final approach and during landing

D.the horizontal distance a pilot should see down the final approach and during landing

正确答案是D