The diagram displays the findings from an experiment carried out with leaves of equal surface area taken from two different species. Each leaf was placed on a balance in daylight inside a closed room, and its mass was measured at $1$ hour intervals. What could account for these results?
- ALeaf 1 has a thicker cuticle than leaf 2.
- BLeaf 1 is thinner than leaf 2.
- CLeaf 2 has stomata protected by hairs and leaf 1 does not.
- DLeaf 2 has sunken stomata and leaf 1 does not.