Hi Shalini,
It could be either option four if the Agent is making a sale on the call or Option two if the Agent just generates the lead and finally leaves it upto the team in the field to close it. Furthermore it would most often come from the client what he/she wants from the vendor. Even other options could be used as the pointers that will show a positive or a negative relation impacting or not impacting the agreed Service level.
My views above could be irrelevant due to inexperience, however i would atleast want to add whatever value i can.
Thanks & Regards,
Zahoor Sofi