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The table shows the transpiration rates of a xerophyte plant, Agave, under three different environmental conditions.
| Condition | Transpiration rate (mg water per cm² leaf per hour) |
|---|---|
| A: still air, 20°C, 40% relative humidity | 12.5 |
| B: still air, 20°C, 80% relative humidity | 4.8 |
| C: windy, 20°C, 40% relative humidity | 28.3 |
Compare the transpiration rates shown in the table. Use your knowledge of the apoplast and symplast pathways for water uptake and the cohesion-tension mechanism to explain the differences observed.