When can the Collector take Possession of the Land under Acquisition process u/s 38?

• A. after ensuring the full payment of compensation within the period of three months
• B. after ensuring rehabilitation and resettlement entitlements are paid or tendered to the entitled persons within a period of six months for the monetary part of rehabilitation and resettlements.
• C. after the publication of notification showing the intension to acquire
• D. both (a) & (b)