Answer:
Whole milk is the most dense of all of these options.
Step-by-step explanation:
Whole milk's density is 1.035 kg/L when the temperature is 4.4°C.
The density of Oxygen is 1.43 g/L at STP.
The density of lead is 207.2 g/L.
The density of corn oil is 0.9185 g/mL.