What Does the Exclusionary Rule State

What does the exclusionary rule state?

A) If government agents engage in unlawful searches or seizures, then any fruits of that action could not be used in subsequent prosecutions.
B) If contraband is found in pursuit of items covered under the original warrant, a secondary warrant is necessary.
C) Warrantless searches at the border are acceptable on their face.
D) Officers are not precluded from making warrantless entries if they reasonably believe that an individual is in need of immediate aid.