Two birds leave their nest at the same time. The first bird flies 50 km due east, while the second bird flies 75 km due west. Select all of the following that are true of the birds' position
A The first bird is +50 km relative to the nest.
B. The first bird is +125 km relative to the nest
C. The second bird is -25 km relative to the nest
D. The second bird is -75 km relative to the nest.
E. The second bird is - 125 km relative to the rest
OF The first bird is -25 km relative to the nest.