Click the <<ItemExhibitName>> button to view the exhibit.
Given the exhibit, what is the stock_curs cursor being used to do?
A . supply an "index of primary keys" to the stock_all_curs
B . lock the current row of data in the database table to prevent the data from becoming stale
C . check if any new rows have been inserted into the table since the stock_all_curs was last opened
D . fetch the complete row of data from the database for the primary key supplied by the stock_all_curs
Answer: A