Which of the following methods should be used by a client to obtain a JNDI initial context and create the most portable code?

Which of the following methods should be used by a client to obtain a JNDI initial context and
create the most portable code?

A.
InitialContext.getDefaultInitCtx();

B.
InitialContext.InitialContext(Boolean);

C.
InitialContext.InitialContext(HashTable);

D.
InitialContext.getEnvironment();