wacc practice exam 3 Q9

I just did this Schw practice exam 3 Q9, but Q said DC plan. Not DB plan, did we not learn that there is not much burden on emplyer or company becaz the risk is owed to the emoloyee. 100% equities ; Valuation / optimal structure: so I said Valuation does not change caz it is DC. and it is optimal structure for this co as many employees are young. Pls, anyone who has idea , help !

sorry guys, wrong place,