During this stage of the team development model people tend to be polite and will defer to the existing authority of a formal or informal leader.

I Will Go With Option " D " 

D)    forming^^^^^^^^^^^^^^^^^^^

 D)  >>>>>>>>>>>>>>>>>>  forming

forming makes the most sense to me .... Option  D

I agree with you sir vinod jetley . 

d >>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>

forming as you said sir----------------------------------