This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Is this a question about entity or session beans? Either way, option D does not represent a valid signature. For session beans, ejbCreate() should have void return type. For entity beans, ejbCreate() returns the primary key type, which cannot be a primitive type like int. (Note that getPrimaryKey() returns a java.lang.Object!)