Which of the Following Statements About Substitution Variables Is Incorrect?​

Multiple Choice

Which of the following statements about substitution variables is incorrect?​

A) ​They allow you to add records to a table without issuing the same command again and again.
B) ​A substitution variable is identified by an ampersand and the variable name.
C) ​When Oracle10g executes a command with a substitution variable,it will prompt the user to enter a value.
D) ​The command SET VERIFY OFF will delete all values stored in substitution variables.