Please someone help 60points

any one of the statements could be an accurate comparison. but the statement that would define the correct choice and seal the deal is not even on the list:

"the visibilities of vector-x and vector-y in the drawing provided with the question are identical and nonexistent."

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000