单选题 J2EE is a single-language platform; calls from/to objects in other languages are possible through ＿＿＿＿＿＿＿＿, but this kind of support is not a ubiquitous part of the platform. 的答案

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题目内容：
J2EE is a single-language platform; calls from/to objects in other languages are possible through ＿＿＿＿＿＿＿＿, but this kind of support is not a ubiquitous part of the platform.
题目选项