Butane hash oil is created by the process of pushing liquid butane through a tube packed with marijuana.

• A. It is created by heating plant material with steam.
• B. It is created by washing with cold water.
• C. It is created by pressing plant material under high pressure.
• D. It is created by pushing liquid butane through a tube packed with marijuana.

Answer: (D)

The concept being tested is solvent extraction using a hydrocarbon solvent to pull cannabinoids from cannabis plant matter. Butane hash oil is produced by using liquid butane as a solvent to dissolve cannabinoids and other resins from the marijuana plant. Pushing liquid butane through a tube packed with marijuana describes that solvent-based extraction step, which is the defining method for creating this type of concentrate. After the cannabinoids are dissolved, the butane is removed to leave the concentrated resin.

Other methods described involve different extraction approaches that don’t use a hydrocarbon solvent in the same way: heating with steam relies on heat to vaporize compounds rather than dissolving them in a solvent; washing with cold water uses ice-water separation of trichomes; pressing under high pressure is mechanical extraction (like rosin) without solvents. So the described butane flow-through process best matches the way butane hash oil is made.