题目内容：
The use of greenhouses dates backat least to the Middle Ages，when they were constructed to protect unusualtropical plants brought back to Europe by travelersto Africa and Asia．Italy，France，England，andHolland all developed greenhouses Lineof glass and wood or glass and iron．French orangeries were designed to protect(5)orange trees—an enormous onewas erected at the Palace of Versailles under Louis XTV—and pineries were builtto protect pineapples．In Holland．gardeners grew medicinal plantsunder glass．As tlle price of glass came down．greenhouses becameever more elaborate and grand，culminating in Joseph Paxton’sCrystal Palace，a 990．000一square—footconservatory built for London’sGreat Exhibition of l851．
Consider each of the choicesseparately and select all that apply． 根据以上内容，回答题。
Whichof these can be inferred from the factthat the French built orangeries for certain tropical plants?
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