A storage administrator has a single-node FAS cluster. The administrator wants to add a second node to convert the FAS storage array into a switchless cluster. In this scenario, what would the administrator do to accomplish the task? 

Add a new AFF HA pair and replace the existing FAS. 

Add a cluster interconnect switch and a second FAS of the same model. 

Add a new single node AFF controller to the existing FAS storage array. 

Add a new single node FAS controller of the same model.