Help ASAP please please I give you a cookie

Answer:
I'm pretty sure its B sorry if I'm wrong
Step-by-step explanation:
can I get a cookie now
Answer:
The inner circle has a radius of 7 and the outer circle has a radius of 9 and the
formula to get the circumference of a circle is 2pi r where r is the radius. 18-14 =[tex]\boxed{B) 4}[/tex]
Hope this helped and brainliest please