Movement into and out of cells — practice question

A potometer was used to determine the transpiration rate of a leafy shoot. Which units could be correct?

• A$\text{cm min}$
• B$\text{cm}^2\,\text{min}^{-1}$
• C$\text{cm}^3\,\text{g}^{-1}\,\text{min}$
• D$\text{cm}^3\,\text{min}^{-1}$