Pls help! I need to know if this is right! 50 points!

A small delivery company can deliver only in a small part of the city. Write an equation for the boundary where the company delivers. and find its radius.

Select the appropriate response:

A) (x+1)2+(y-1)2= 25 radius = 5 miles

B) (x-1)2+(y+1)2= 25 radius = 5 miles

C) (x+1)2+(y-1)2= 25 radius = 10 miles

D) (x-1)2+(y+1)2= 25 radius = 10 miles