Answer:
D.Get a warrant before they enter a home is the correct answer.
Step-by-step explanation:
The Fourth Amendment protects personal privacy and the right of every citizen to be free from unreasonable from government intrusion in their homes, schools, businesses, etcetera.
It means that the police cannot just stop a person walking in the street, or that they cannot enter the house of an individual to arrest him or her or to look for evidence. If they want to do so, the police will need a warrant before they enter a home, so D is the correct answer. The warrant would be unnecessary only if the police had a probable cause that an individual has committed a crime.