Which two statements are true about substitution variables?

Question

Options

• AA substitution variable prefixed with & always prompts only once for a value in a session.
• BA substitution variable prefixed with to prompts only once for a value in a session unless it is set to
• CA substitution variable can be used only in a select statement.
• DA substitution variable used to prompt for a column name must be enclosed in single quotation
• EA substitution variable can be used with any clause in a select statement.
• FA substitution variable used to prompt for a column name must be enclosed in double quotation