( C )Within the plant, behind the tough lining, the livin g sap of the cactus flowed. This liquid kept the temperature inside the hole well below the hot midday temperature outside. All day the cactus absorbed heat from the sun, but the interior of the hole remainedcooler than the sweltering outdoors. At night, when the outside heat quickly escaped into the sky, the woodpeckers were snug in theirhouse, heated now by the warmed cactus sap.52. What is the purpose this passage?
(A)It explains why the woodpeckers’ apartment in the saguaro is air-conditioned.
(B) It gives the process of how woodpeckers make an apartment in the saguaro.
(C) It shows us why the cactus isn’t an ideal place for the woodpeckers.
(D)It shows how the temperature in the cactus changes with the temperature outside.