ABC is a $$0.8\,m$$ long curved wire track in a vertical plane. A bead of mass $$3\,g$$ is released from rest at A. It slides along the wire and comes to rest at C. The average frictional force opposing the motion in a single trip from A to C is

A

$$18.40\times10^{-3}\,N$$

B

$$29.4\times10^{-3}\,N$$

C

$$11.04\times10^{-3}\,N$$

D

$$7.36\times10^{-3}\,N$$