Which optical illusion might be caused by a runway with an upslope during the approach?

Question

Question Quiz SPL - Sailplane Pilot License - Human Performance and limitations

QuizVDS · Accepted Answer

The pilot has the feeling that the approach is too high and therefore descents below the regular glide slope

QuizVDS · Answer

The pilot has the feeling that the approach is too low and therefore approaches the runway above the regular glide slope

QuizVDS · Answer

The pilot has the feeling that the approach is too slow and speeds up above the normal approach speed

QuizVDS · Answer

The pilot has the feeling that the approach is too fast and reduces the speed below the normal approach speed

Id 270 - SPL - Which optical illusion might be caused by a runway with an upslope during the approach?