Can the following be achieved via configuration of control variables in the out-of-the-box Lifecycle Manager...

Yes, specifying which access items may be requested can be achieved via configuration of control variables in the out-of-the-box Lifecycle Manager (LCM) workflows. In IdentityIQ, control variables within LCM workflows allow administrators to define the scope and criteria for access requests, including restricting or specifying which entitlements, roles, or applications can be requested by users. This is part of the request configuration process, where the access items that users can see and request are defined.

Therefore, the correct answer is A. Yes.