What is the most important reason for providing an accused criminal the miranda warning?

if citizens are not provided their miranda rights, they may give the officers incriminating information that connects them to a crime.

if someone is convicted of a crime, and he wasn't provided his miranda warning when arrested, his prison time could be much shorter than it should be.

if an accused criminal is provided a miranda warning, a court hearing that includes a jury is not usually necessary for a conviction.

if police gather information from an accused criminal without providing miranda rights, they could convict the wrong person.