Which condition must be true in order that a view is considered updateable?

[answerhappygod]

Which condition must be true in order that a view is considered updateable?

A. The user must have the UPDATE or DELETE privilege for the underlying table.
B. There must be a subquery in the WHERE clause that refers to a table in the FROM clause.
C. There must be a one-to-one relationship between the rows in the view and the rows in the underlying table.
D. The view must only refer to literal values.