Which statement best explains why the transpiration rate of a cactus is so much lower than that of a rose bush and a dogwood?

Transpiration is the evaporation of water produced during photosynthesis from the parts of a plant exposed to air, especially from its leaves. The rate of transpiration varies among species of plants, as seen in the table below.

Which statement best explains why the transpiration rate of a cactus is so much lower than that of a rose bush and a dogwood?
A . The cactus has adapted to dry climates through greatly reduced leaf surfaces.
B . The cactus contains parasitic insects that are consuming the water in the plant’s roots.
C . The rose and the dogwood are water plants, so water cannot evaporate from their surfaces.
D . The dogwood transpires more than the rose because the dogwood’s roots are deeper.
E . The cactus is not a plant, so it does not produce water during photosynthesis.

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Answer: A