Which of the Following Is TRUE Regarding the Knock-And-Announce Exception

Which of the following is TRUE regarding the knock-and-announce exception?

A) This exception permits the admission of evidence seized during searches of homes,even when officers violate the knock-and-announce rule.
B) Evidence seized during searches of homes wherein the officers violated the knock-and-announce rule can be excluded from trial,but only at the discretion of the prosecutor.
C) Evidence seized during searches of homes wherein the officers violated the knock-and-announce rule is automatically excluded from trial.
D) Evidence seized during searches of homes wherein the officers violated the knock-and-announce rule is excluded from trial if a judge determines knock-and-announce was violated through a special suppression hearing.