You've designed an application that allows customers to buy chapters of e-books. Due to the enormous success of the project, there are plans to launch this application worldwide. In the process of converting the application to be suitable for worldwide use which of the following would you find yourself using frequently?

a. Defines create (), find (), remove (Object) methods.
b. Defines signatures of EJB's business methods.
c. Defines the persistence of the bean, e.g. how to persist etc.
d. Defines all methods that the client can call on the EJB.
e. You don't need a Remote interface for an EJB. An EJB consists of a Home interface and an EJBObject interface.