The Police, While Patrolling a Neighborhood, Observe and Hear a Lot

The police, while patrolling a neighborhood, observe and hear a lot of loud noises coming from a house. They walk up to the house and knock on the front door. The homeowner opens the door allowing the police officer to see into the house and the meth lab setting in the front room. Which statement below is incorrect?

A) The evidence would be admissible under the plain-view doctrine
B) The evidence would be admissible under the theory of consent
C) The evidence would be admissible under the theory of implied warrant
D) The evidence would be admissible under the Constitution