Why does the code give an error on execution?

View the Exhibit and examine the code.

Why does the code give an error on execution?

A.
because the WORD_LIST variable is not visible in procedure wording

B.
because the lexicon variable is not visible in procedure ADD_ENTRY

C.
because the lexicon variable is not initialized in procedure wording

D.
because the WORD_LIST parameter in out mode cannot be of a record data type