It's C)910 m
Because first they will go to see the lions(160m) then they will have to go back to the start so another 160m
So for now 160+160=320
Then they will go to see the giraffes, so they will go another 420m
Which means
320+420=740
Then they don't have to go from the starting point again but only go back to the 250m
So:
740+(420-250)= 740+170=910
Please mark brainliest if you can I'd really appreciate it :)