The parent T Corporation owned 80% of Company J's stock as of February 2, 2016; on June 2, 2016, a liquidating distribution of all of Company J's property was made to T Corporation in complete redemption of the subsidiary's stock in accordance with a formal plan. Which element of these proceedings was not required by provisions of 332 regarding liquidation of subsidiaries?
A formal plan b. 80% ownership of the subsidiary's stock 100% property distribution Distribution of all assets within one taxable year of the subsidiary or a formal plan