Option A is incorrect because the structure of the attribute declarations is wrong. Java syntax does NOT match UML syntax. Option B is incorrect because the structure of the attribute declarations is wrong. Option C is incorrect because the structure of the attribute declarations is wrong. Java syntax does NOT match UML syntax. Option D is correct because this is the proper Java to implement this UML diagram. Option E is incorrect because the private and public keywords need to precede every attribute declaration. This is actually C++ syntax.