of all railroad crossing collisions occurred when the gates and flashing lights are present and working…

of all railroad crossing collisions occurred when the gates and flashing lights are present and working. \nhalf\n1/4\nnone of these\n100%

of all railroad crossing collisions occurred when the gates and flashing lights are present and working. \nhalf\n1/4\nnone of these\n100%

Answer

Brief Explanations:

This is a knowledge - based question about railroad crossing collision statistics. In reality, not all collisions occur when gates and flashing lights are present and working, and it's not half or a quarter or 100%.

Answer:

C. none of these