Answer:
One type of Oil (canola oil) can be separated from the mixture by Cooling in a Freezer.
Step-by-step explanation:
The data given is as;
Oil Melting Point / Freezing Point
Canola Oil 10 °C
Corn Oil -11 °C
Sunflower Oil -17 °C
Peanut Oil -2 °C
When the mixture of these oils is cooled to 5 °C only the Canola oil will solidify because it has a melting point of 10 °C and exists in solid state below 10 °C (Freezing Point). Therefore, it can easily be separated from remaining mixture which is present in liquid state.
While, simple distillation is not possible because Oils have Smoke point instead of boiling point as at that high temperature oils tend to produce smoke and burns hence, it is not the efficient method.