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化学是以实验为基础的自然科学，通过实验可以得知物质的组成 、结构、性质及其变化规律。下列通过实验得出的结论正确的是( )

A、水通电分解生成氢气和氧气，说明水是由氧气和氢气组成的。

B、通过肉眼观察，就可得知木炭具有疏松多孔的结构

C、白磷可以在氧气中燃烧，说明氧气具有可燃性

D、将紫色石蕊试液分别滴稀盐酸、稀硫酸中，紫色石蕊均变红，说明酸一般能使紫色石蕊变红